Words that rhyme with interrelation

• adulation 0
  n 1: servile flattery; exaggerated and hypocritical praise
• ambulation 0
  n 1: walking about; "the hospital encouraged early ambulation"
• annihilation 0
  n 1: destruction by annihilating something [syn: annihilation, obliteration] 2: total destruction; "bomb tests resulted in the annihilation of the atoll" [syn: annihilation, disintegration]
• articulation 0
  n 1: the aspect of pronunciation that involves bringing articulatory organs together so as to shape the sounds of speech 2: the shape or manner in which things come together and a connection is made [syn: articulation, join, joint, juncture, junction] 3: expressing in coherent verbal form; "the articulation of my feelings"; "I gave voice to my feelings" [syn: articulation, voice] 4: (anatomy) the point of connection between two bones or elements of a skeleton (especially if it allows motion) [syn: joint, articulation, articulatio] 5: the act of joining things in such a way that motion is possible
• assimilation 0
  n 1: the state of being assimilated; people of different backgrounds come to see themselves as part of a larger national family 2: the social process of absorbing one cultural group into harmony with another [syn: assimilation, absorption] 3: the process of absorbing nutrients into the body after digestion [syn: assimilation, absorption] 4: a linguistic process by which a sound becomes similar to an adjacent sound 5: the process of assimilating new ideas into an existing cognitive structure [syn: acculturation, assimilation] 6: in the theories of Jean Piaget: the application of a general schema to a particular instance
• automation 0
  n 1: the act of implementing the control of equipment with advanced technology; usually involving electronic hardware; "automation replaces human workers by machines" [syn: automation, mechanization, mechanisation] 2: the condition of being automatically operated or controlled; "automation increases productivity" 3: equipment used to achieve automatic control or operation; "this factory floor is a showcase for automation and robotic equipment"
• calculation 0
  n 1: the procedure of calculating; determining something by mathematical or logical methods [syn: calculation, computation, computing] 2: problem solving that involves numbers or quantities [syn: calculation, computation, figuring, reckoning] 3: planning something carefully and intentionally; "it was the deliberation of his act that was insulting" [syn: calculation, deliberation]
• cancellation 0
  n 1: the act of cancelling; calling off some arrangement 2: the speech act of revoking or annulling or making void
• capitulation 0
  n 1: a document containing the terms of surrender 2: a summary that enumerates the main parts of a topic 3: the act of surrendering (usually under agreed conditions); "they were protected until the capitulation of the fort" [syn: capitulation, fall, surrender]
• circulation 0
  n 1: the dissemination of copies of periodicals (as newspapers or magazines) 2: movement through a circuit; especially the movement of blood through the heart and blood vessels 3: (library science) the count of books that are loaned by a library over a specified period 4: number of copies of a newspaper or magazine that are sold; "by increasing its circulation the newspaper hoped to increase its advertising" 5: free movement or passage (as of cytoplasm within a cell or sap through a plant); "ocean circulation is an important part of global climate"; "a fan aids air circulation" 6: the spread or transmission of something (as news or money) to a wider group or area
• coagulation 0
  n 1: the process of forming semisolid lumps in a liquid [syn: curdling, clotting, coagulation]
• collation 0
  n 1: a light informal meal [syn: bite, collation, snack] 2: assembling in proper numerical or logical sequence 3: careful examination and comparison to note points of disagreement
• compilation 0
  n 1: something that is compiled (as into a single book or file) [syn: compilation, digest] 2: the act of compiling (as into a single book or file or list); "the job of compiling the inventory took several hours" [syn: compilation, compiling]
• confabulation 0
  n 1: an informal conversation [syn: chat, confab, confabulation, schmooze, schmoose] 2: (psychiatry) a plausible but imagined memory that fills in gaps in what is remembered
• congratulation 0
  n 1: the act of acknowledging that someone has an occasion for celebration [syn: congratulation, felicitation] 2: (usually plural) an expression of pleasure at the success or good fortune of another; "I sent them my sincere congratulations on their marriage" [syn: congratulation, felicitation]
• consolation 0
  n 1: the comfort you feel when consoled in times of disappointment; "second place was no consolation to him" [syn: consolation, solace, solacement] 2: the act of consoling; giving relief in affliction; "his presence was a consolation to her" [syn: consolation, comfort, solace]
• constellation 0
  n 1: an arrangement of parts or elements; "the outcome depends on the configuration of influences at the time" [syn: configuration, constellation] 2: a configuration of stars as seen from the earth
• copulation 0
  n 1: the act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur [syn: sexual intercourse, intercourse, sex act, copulation, coitus, coition, sexual congress, congress, sexual relation, relation, carnal knowledge]
• correlation 0
  n 1: a reciprocal relation between two or more things [syn: correlation, correlativity] 2: a statistic representing how closely two variables co-vary; it can vary from -1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation); "what is the correlation between those two variables?" [syn: correlation coefficient, coefficient of correlation, correlation] 3: a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other [syn: correlation, correlational statistics]
• creation 0
  n 1: the human act of creating [syn: creation, creative activity] 2: an artifact that has been brought into existence by someone 3: the event that occurred at the beginning of something; "from its creation the plan was doomed to failure" [syn: creation, conception] 4: the act of starting something for the first time; introducing something new; "she looked forward to her initiation as an adult"; "the foundation of a new scientific society" [syn: initiation, founding, foundation, institution, origination, creation, innovation, introduction, instauration] 5: (theology) God's act of bringing the universe into existence 6: everything that exists anywhere; "they study the evolution of the universe"; "the biggest tree in existence" [syn: universe, existence, creation, world, cosmos, macrocosm]
• defibrillation 0
  n 1: treatment by stopping fibrillation of heart muscles (usually by electric shock delivered by a defibrillator)
• demodulation 0
  n 1: (electronics) the reception of a signal by extracting it from the carrier wave
• depopulation 0
  n 1: the condition of having reduced numbers of inhabitants (or no inhabitants at all)
• desolation 0
  n 1: the state of being decayed or destroyed [syn: devastation, desolation] 2: a bleak and desolate atmosphere; "the nakedness of the landscape" [syn: bleakness, desolation, bareness, nakedness] 3: sadness resulting from being forsaken or abandoned [syn: forlornness, loneliness, desolation] 4: an event that results in total destruction [syn: devastation, desolation]
• dilation 0
  n 1: a lengthy discussion (spoken or written) on a particular topic 2: the act of expanding an aperture; "the dilation of the pupil of the eye" [syn: dilation, dilatation]
• dissimilation 0
  n 1: a linguistic process by which one of two similar sounds in a word becomes less like the other; "the Old French MARBRE became the English MARBLE by dissimilation" 2: breakdown in living organisms of more complex substances into simpler ones together with release of energy [syn: catabolism, katabolism, dissimilation, destructive metabolism] [ant: anabolism, constructive metabolism]
• dissimulation 0
  n 1: the act of deceiving [syn: deception, deceit, dissembling, dissimulation]
• distillation 0
  n 1: the process of purifying a liquid by boiling it and condensing its vapors [syn: distillation, distillment] 2: a purified liquid produced by condensation from a vapor during distilling; the product of distilling [syn: distillate, distillation]
• ejaculation 0
  n 1: an abrupt emphatic exclamation expressing emotion [syn: ejaculation, interjection] 2: the discharge of semen in males
• elation 0
  n 1: an exhilarating psychological state of pride and optimism; an absence of depression [ant: depression] 2: a feeling of joy and pride [syn: elation, high spirits, lightness]
• emasculation 0
  n 1: loss of power and masculinity 2: neutering a male animal by removing the testicles [syn: castration, emasculation]
• emulation 0
  n 1: ambition to equal or excel 2: (computer science) technique of one machine obtaining the same results as another 3: effort to equal or surpass another
• escalation 0
  n 1: an increase to counteract a perceived discrepancy; "higher wages caused an escalation of prices"; "there was a gradual escalation of hostilities"
• exhalation 0
  n 1: exhaled breath [syn: halitus, exhalation] 2: the act of expelling air from the lungs [syn: exhalation, expiration, breathing out]
• expostulation 0
  n 1: the act of expressing earnest opposition or protest [syn: expostulation, remonstrance, remonstration, objection] 2: an exclamation of protest or remonstrance or reproof
• extrapolation 0
  n 1: (mathematics) calculation of the value of a function outside the range of known values 2: an inference about the future (or about some hypothetical situation) based on known facts and observations
• flagellation 0
  n 1: beating as a source of erotic or religious stimulation 2: beating with a whip or strap or rope as a form of punishment [syn: whipping, tanning, flogging, lashing, flagellation]
• flocculation 0
  n 1: the process of flocculating; forming woolly cloudlike aggregations
• formulation 0
  n 1: a substance prepared according to a formula; "the physician prescribed a commercial preparation of the medicine" [syn: formulation, preparation] 2: inventing or contriving an idea or explanation and formulating it mentally [syn: conceptualization, conceptualisation, formulation] 3: the style of expressing yourself; "he suggested a better formulation"; "his manner of expression showed how much he cared" [syn: formulation, expression]
• gesticulation 0
  n 1: a deliberate and vigorous gesture or motion
• granulation 0
  n 1: new connective tissue and tiny blood vessels that form on the surfaces of a wound during the healing process [syn: granulation, granulation tissue] 2: the act of forming something into granules or grains; "the granulation of medicines"
• immolation 0
  n 1: killing or offering as a sacrifice
• inhalation 0
  n 1: the act of inhaling; the drawing in of air (or other gases) as in breathing [syn: inhalation, inspiration, aspiration, intake, breathing in] 2: a medication to be taken by inhaling it [syn: inhalant, inhalation]
• inoculation 0
  n 1: taking a vaccine as a precaution against contracting a disease [syn: inoculation, vaccination]
• inosculation 0
  n 1: a natural or surgical joining of parts or branches of tubular structures so as to make or become continuous [syn: anastomosis, inosculation]
• installation 0
  n 1: the act of installing something (as equipment); "the telephone installation took only a few minutes" [syn: installation, installing, installment, instalment] 2: a building or place that provides a particular service or is used for a particular industry; "the assembly plant is an enormous facility" [syn: facility, installation] 3: a formal entry into an organization or position or office; "his initiation into the club"; "he was ordered to report for induction into the army"; "he gave a speech as part of his installation into the hall of fame" [syn: initiation, induction, installation]
• instillation 0
  n 1: the introduction of a liquid (by pouring or injection) drop by drop [syn: instillation, instillment, instilment] 2: a liquid that is instilled drop by drop
• insulation 0
  n 1: the state of being isolated or detached; "the insulation of England was preserved by the English Channel" [syn: insulation, insularity, insularism, detachment] 2: a material that reduces or prevents the transmission of heat or sound or electricity [syn: insulating material, insulant, insulation] 3: the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity
• intercalation 0
  n 1: an insertion into a calendar [syn: embolism, intercalation]
• interpellation 0
  n 1: (parliament) a parliamentary procedure of demanding that a government official explain some act or policy 2: the action of interjecting or interposing an action or remark that interrupts [syn: interjection, interposition, interpolation, interpellation]
• interpolation 0
  n 1: a message (spoken or written) that is introduced or inserted; "with the help of his friend's interpolations his story was eventually told"; "with many insertions in the margins" [syn: interpolation, insertion] 2: (mathematics) calculation of the value of a function between the values already known 3: the action of interjecting or interposing an action or remark that interrupts [syn: interjection, interposition, interpolation, interpellation]
• isolation 0
  n 1: a state of separation between persons or groups 2: a feeling of being disliked and alone 3: the act of isolating something; setting something apart from others [syn: isolation, closing off] 4: (psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it 5: a country's withdrawal from international politics; "he opposed a policy of American isolation"
• jubilation 0
  n 1: a feeling of extreme joy [syn: exultation, jubilance, jubilancy, jubilation] 2: a joyful occasion for special festivities to mark some happy event [syn: celebration, jubilation] 3: the utterance of sounds expressing great joy [syn: exultation, rejoicing, jubilation]
• machicolation 0
  n 1: a projecting parapet supported by corbels on a medieval castle; has openings through which stones or boiling water could be dropped on an enemy
• maculation 0
  n 1: a small contrasting part of something; "a bald spot"; "a leopard's spots"; "a patch of clouds"; "patches of thin ice"; "a fleck of red" [syn: spot, speckle, dapple, patch, fleck, maculation] 2: the act of spotting or staining something [syn: staining, spotting, maculation]
• manipulation 0
  n 1: exerting shrewd or devious influence especially for one's own advantage; "his manipulation of his friends was scandalous" [syn: manipulation, use] 2: the action of touching with the hands (or the skillful use of the hands) or by the use of mechanical means [syn: handling, manipulation]
• miscalculation 0
  n 1: a mistake in calculating [syn: miscalculation, misreckoning, misestimation]
• mistranslation 0
  n 1: an incorrect translation
• modulation 0
  n 1: a musical passage moving from one key to another [syn: transition, modulation] 2: (electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase 3: rise and fall of the voice pitch [syn: intonation, modulation, pitch contour] 4: a manner of speaking in which the loudness or pitch or tone of the voice is modified [syn: modulation, inflection] 5: the act of modifying or adjusting according to due measure and proportion (as with regard to artistic effect)
• oscillation 0
  n 1: the process of oscillating between states 2: (physics) a regular periodic variation in value about a mean [syn: oscillation, vibration] 3: a single complete execution of a periodically repeated phenomenon; "a year constitutes a cycle of the seasons" [syn: cycle, oscillation]
• osculation 0
  n 1: (mathematics) a contact of two curves (or two surfaces) at which they have a common tangent 2: the act of caressing with the lips (or an instance thereof) [syn: kiss, buss, osculation]
• ovulation 0
  n 1: the expulsion of an ovum from the ovary (usually midway in the menstrual cycle) [ant: anovulation]
• peculation 0
  n 1: the fraudulent appropriation of funds or property entrusted to your care but actually owned by someone else [syn: embezzlement, peculation, defalcation, misapplication, misappropriation]
• perambulation 0
  n 1: a walk around a territory (a parish or manor or forest etc.) in order to officially assert and record its boundaries 2: a leisurely walk (usually in some public place) [syn: amble, promenade, saunter, stroll, perambulation]
• percolation 0
  n 1: the slow passage of a liquid through a filtering medium; "the percolation of rainwater through the soil"; "the infiltration of seawater through the lava" [syn: percolation, infiltration] 2: the act of making coffee in a percolator 3: the filtration of a liquid for extraction or purification
• population 0
  n 1: the people who inhabit a territory or state; "the population seemed to be well fed and clothed" 2: a group of organisms of the same species inhabiting a given area; "they hired hunters to keep down the deer population" 3: (statistics) the entire aggregation of items from which samples can be drawn; "it is an estimate of the mean of the population" [syn: population, universe] 4: the number of inhabitants (either the total number or the number of a particular race or class) in a given place (country or city etc.); "people come and go, but the population of this town has remained approximately constant for the past decade"; "the African-American population of Salt Lake City has been increasing" 5: the act of populating (causing to live in a place); "he deplored the population of colonies with convicted criminals"
• postulation 0
  n 1: (logic) a declaration of something self-evident; something that can be assumed as the basis for argument [syn: postulation, predication] 2: a formal message requesting something that is submitted to an authority [syn: request, petition, postulation]
• recalculation 0
  n 1: the act of calculating again (usually to eliminate errors or to include additional data); "recalculation yielded a much larger value"
• regulation 0
  adj 1: prescribed by or according to regulation; "regulation army equipment" n 1: an authoritative rule [syn: regulation, ordinance] 2: a principle or condition that customarily governs behavior; "it was his rule to take a walk before breakfast"; "short haircuts were the regulation" [syn: rule, regulation] 3: the state of being controlled or governed 4: (embryology) the ability of an early embryo to continue normal development after its structure has been somehow damaged or altered 5: the act of bringing to uniformity; making regular [syn: regulation, regularization, regularisation] 6: the act of controlling or directing according to rule; "fiscal regulations are in the hands of politicians" [syn: regulation, regulating]
• relation 0
  n 1: an abstraction belonging to or characteristic of two entities or parts together 2: the act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur [syn: sexual intercourse, intercourse, sex act, copulation, coitus, coition, sexual congress, congress, sexual relation, relation, carnal knowledge] 3: a person related by blood or marriage; "police are searching for relatives of the deceased"; "he has distant relations back in New Jersey" [syn: relative, relation] 4: an act of narration; "he was the hero according to his own relation"; "his endless recounting of the incident eventually became unbearable" [syn: relation, telling, recounting] 5: (law) the principle that an act done at a later time is deemed by law to have occurred at an earlier time; "his attorney argued for the relation back of the amended complaint to the time the initial complaint was filed" [syn: relation back, relation] 6: (usually plural) mutual dealings or connections among persons or groups; "international relations"
• reticulation 0
  n 1: (photography) the formation of a network of cracks or wrinkles in a photographic emulsion 2: an arrangement resembling a net or network; "the reticulation of a leaf"; "the reticulation of a photographic emulsion"
• revelation 0
  n 1: the speech act of making something evident [syn: disclosure, revelation, revealing] 2: an enlightening or astonishing disclosure 3: communication of knowledge to man by a divine or supernatural agency [syn: revelation, divine revelation] 4: the last book of the New Testament; contains visionary descriptions of heaven and of conflicts between good and evil and of the end of the world; attributed to Saint John the Apostle [syn: Revelation, Revelation of Saint John the Divine, Apocalypse, Book of Revelation]
• scintillation 0
  n 1: (physics) a flash of light that is produced in a phosphor when it absorbs a photon or ionizing particle 2: a rapid change in brightness; a brief spark or flash [syn: twinkle, scintillation, sparkling] 3: a brilliant display of wit 4: the quality of shining with a bright reflected light [syn: glitter, glister, glisten, scintillation, sparkle] 5: the twinkling of the stars caused when changes in the density of the earth's atmosphere produce uneven refraction of starlight
• simulation 0
  n 1: the act of imitating the behavior of some situation or some process by means of something suitably analogous (especially for the purpose of study or personnel training) 2: (computer science) the technique of representing the real world by a computer program; "a simulation should imitate the internal processes and not merely the results of the thing being simulated" [syn: simulation, computer simulation] 3: representation of something (sometimes on a smaller scale) [syn: model, simulation] 4: the act of giving a false appearance; "his conformity was only pretending" [syn: pretense, pretence, pretending, simulation, feigning]
• speculation 0
  n 1: a message expressing an opinion based on incomplete evidence [syn: guess, conjecture, supposition, surmise, surmisal, speculation, hypothesis] 2: a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence); "speculations about the outcome of the election"; "he dismissed it as mere conjecture" [syn: speculation, conjecture] 3: an investment that is very risky but could yield great profits; "he knew the stock was a speculation when he bought it" [syn: speculation, venture] 4: continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature; "the habit of meditation is the basis for all real knowledge" [syn: meditation, speculation]
• stimulation 0
  n 1: the act of arousing an organism to action 2: any stimulating information or event; acts to arouse action [syn: stimulation, stimulus, stimulant, input] 3: (physiology) the effect of a stimulus (on nerves or organs etc.) 4: mutual sexual fondling prior to sexual intercourse [syn: foreplay, arousal, stimulation]
• stipulation 0
  n 1: (law) an agreement or concession made by parties in a judicial proceeding (or by their attorneys) relating to the business before the court; must be in writing unless they are part of the court record; "a stipulation of fact was made in order to avoid delay" [syn: stipulation, judicial admission] 2: an assumption on which rests the validity or effect of something else [syn: condition, precondition, stipulation] 3: a restriction that is insisted upon as a condition for an agreement [syn: stipulation, specification]
• strangulation 0
  n 1: the act of suffocating (someone) by constricting the windpipe; "no evidence that the choking was done by the accused" [syn: choking, strangling, strangulation, throttling] 2: the condition of having respiration stopped by compression of the air passage 3: (pathology) constriction of a body part so as to cut off the flow of blood or other fluid; "strangulation of the intestine"
• tabulation 0
  n 1: information set out in tabular form [syn: tabulation, tabular matter] 2: the act of putting into tabular form; "the tabulation of the results"
• tessellation 0
  n 1: the careful juxtaposition of shapes in a pattern; "a tessellation of hexagons" 2: the act of adorning with mosaic
• titillation 0
  n 1: a tingling feeling of excitement (as from teasing or tickling) 2: an agreeable arousal 3: the act of tickling [syn: tickle, tickling, titillation]
• translation 0
  n 1: a written communication in a second language having the same meaning as the written communication in a first language [syn: translation, interlingual rendition, rendering, version] 2: a uniform movement without rotation 3: the act of changing in form or shape or appearance; "a photograph is a translation of a scene onto a two-dimensional surface" [syn: transformation, translation] 4: (mathematics) a transformation in which the origin of the coordinate system is moved to another position but the direction of each axis remains the same 5: (genetics) the process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm 6: rewording something in less technical terminology 7: the act of uniform movement [syn: translation, displacement]
• triangulation 0
  n 1: a trigonometric method of determining the position of a fixed point from the angles to it from two fixed points a known distance apart; useful in navigation 2: a method of surveying; the area is divided into triangles and the length of one side and its angles with the other two are measured, then the lengths of the other sides can be calculated
• tribulation 0
  n 1: an annoying or frustrating or catastrophic event; "his mother-in-law's visits were a great trial for him"; "life is full of tribulations"; "a visitation of the plague" [syn: trial, tribulation, visitation]
• ululation 0
  n 1: a long loud emotional utterance; "he gave a howl of pain"; "howls of laughter"; "their howling had no effect" [syn: howl, howling, ululation]
• undulation 0
  n 1: an undulating curve [syn: wave, undulation] 2: wavelike motion; a gentle rising and falling in the manner of waves 3: (physics) a movement up and down or back and forth [syn: wave, undulation]
• vacillation 0
  n 1: indecision in speech or action [syn: hesitation, vacillation, wavering] 2: changing location by moving back and forth [syn: swing, swinging, vacillation]
• ventilation 0
  n 1: the act of supplying fresh air and getting rid of foul air [syn: ventilation, airing] 2: a mechanical system in a building that provides fresh air; "she was continually adjusting the ventilation" [syn: ventilation, ventilation system, ventilating system] 3: free and open discussion of (or debate on) some question of public interest; "such a proposal deserves thorough public discussion" [syn: public discussion, ventilation] 4: the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation [syn: breathing, external respiration, respiration, ventilation]
• violation 0
  n 1: a crime less serious than a felony [syn: misdemeanor, misdemeanour, infraction, violation, infringement] 2: an act that disregards an agreement or a right; "he claimed a violation of his rights under the Fifth Amendment" [syn: violation, infringement] 3: entry to another's property without right or permission [syn: trespass, encroachment, violation, intrusion, usurpation] 4: a disrespectful act [syn: irreverence, violation] 5: the crime of forcing a woman to submit to sexual intercourse against her will [syn: rape, violation, assault, ravishment]
• deregulation 0
  n 1: the act of freeing from regulation (especially from governmental regulations) [syn: deregulation, deregulating]
• lallation 0
  n 1: defective articulation of the `l' phoneme or the phoneme `r' is pronounced as `l' 2: gibberish resembling the sounds of a baby [syn: babble, babbling, lallation]
• spallation 0
  n 1: (physics) a nuclear reaction in which a bombarded nucleus breaks up into many particles; "some astronomers believe that the solar system was formed by spallation when the sun was a very young star"
• congelation 0
  n 1: the process of congealing; solidification by (or as if by) freezing [syn: congealment, congelation]
• cumulation 0
  n 1: a collection of objects laid on top of each other [syn: pile, heap, mound, agglomerate, cumulation, cumulus]
• insolation 0
  n 1: sudden prostration due to exposure to the sun or excessive heat [syn: sunstroke, insolation, thermic fever, siriasis] 2: incident solar radiation 3: therapeutic exposure to sunlight [syn: heliotherapy, insolation]
• acidulation 0
• cupellation 0
• decollation 0
• disconsolation 0
• halation 0

See also interrelation definition and interrelation synonyms