| aberration | (noun) an optical phenomenon resulting from the failure of a lens or mirror to produce a good image | Synonyms: distortion, optical aberration |
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| (noun) a disorder in one's mental state | - |
| (noun) a state or condition markedly different from the norm | Synonyms: aberrance, aberrancy, deviance |
| abjuration | (noun) a disavowal or taking back of a previous assertion | Synonyms: recantation, retraction |
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| acceleration | (noun) the act of accelerating; increasing the speed | Synonyms: quickening, speedup |
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| (noun) an increase in rate of change | - |
| (noun) (physics) a rate of increase of velocity | - |
| accelerator | (noun) a valve that regulates the supply of fuel to the engine | Synonyms: throttle, throttle valve |
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| (noun) a scientific instrument that increases the kinetic energy of charged particles | Synonyms: atom smasher, particle accelerator |
| (noun) a pedal that controls the throttle valve | Synonyms: accelerator pedal, gas, gas pedal, gun, throttle |
| (noun) (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected | Synonyms: catalyst |
| acculturation | (noun) the adoption of the behavior patterns of the surrounding culture | Synonyms: enculturation, socialisation, socialization |
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| (noun) all the knowledge and values shared by a society | Synonyms: culture |
| (noun) the process of assimilating new ideas into an existing cognitive structure | Synonyms: assimilation |
| adjuration | (noun) a solemn and earnest appeal to someone to do something | - |
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| administration | (noun) a method of tending to or managing the affairs of some group of people (especially the group's business affairs) | Synonyms: disposal |
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| (noun) the act of administering medication | Synonyms: giving medication |
| (noun) the act of meting out justice according to the law | Synonyms: judicature |
| (noun) the act of governing; exercising authority | Synonyms: governance, governing, government, government activity |
| (noun) the persons (or committees or departments etc.) who make up a body for the purpose of administering something | Synonyms: brass, establishment, governance, governing body, organisation, organization |
| (noun) the tenure of a president | Synonyms: presidency, presidential term |
| administrator | (noun) someone who administers a business | Synonyms: decision maker |
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| (noun) the party appointed by a probate court to distribute the estate of someone who dies without a will or without naming an executor | - |
| (noun) someone who manages a government agency or department | Synonyms: executive |
| admiration | (noun) a favorable judgment | Synonyms: appreciation |
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| (noun) a feeling of delighted approval and liking | Synonyms: esteem |
| (noun) the feeling aroused by something strange and surprising | Synonyms: wonder, wonderment |
| adoration | (noun) the act of admiring strongly | Synonyms: idolisation, idolization |
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| (noun) the worship given to God alone | Synonyms: latria |
| (noun) a feeling of profound love and admiration | Synonyms: worship |
| adulteration | (noun) the act of adulterating (especially the illicit substitution of one substance for another) | - |
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| (noun) being mixed with extraneous material; the product of adulterating | Synonyms: debasement |
| adulterator | (noun) a changer who lessens the purity or effectiveness of a substance | - |
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| (noun) any substance that lessens the purity or effectiveness of a substance | Synonyms: adulterant |
| adumbration | (noun) a sketchy or imperfect or faint representation | - |
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| (noun) the act of providing vague advance indications; representing beforehand | Synonyms: foreshadowing, prefiguration |
| aeration | (noun) the act of charging a liquid with a gas making it effervescent | - |
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| (noun) the process of exposing to air (so as to purify) | - |
| aerator | (noun) an apparatus for exposing something to the air (as sewage) | - |
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| aerogenerator | (noun) generator that extracts usable energy from winds | Synonyms: wind generator, windmill |
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| ageratum | (noun) any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowers | - |
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| (noun) rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatorium | Synonyms: Conoclinium coelestinum, Eupatorium coelestinum, mist-flower, mistflower |
| agglomerate | (noun) a collection of objects laid on top of each other | Synonyms: cumulation, cumulus, heap, mound, pile |
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| (noun) volcanic rock consisting of large fragments fused together | - |
| agglomeration | (noun) the act of collecting in a mass; the act of agglomerating | - |
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| (noun) a jumbled collection or mass | - |
| agglomerator | (noun) a device that causes material to gather into rounded balls | - |
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| aliterate | (noun) a person who can read but is disinclined to derive information from literary sources | Synonyms: aliterate person |
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| alliteration | (noun) use of the same consonant at the beginning of each stressed syllable in a line of verse | Synonyms: beginning rhyme, head rhyme, initial rhyme |
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| alliterator | (noun) a speaker or writer who makes use of alliteration | - |
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| alteration | (noun) the act of revising or altering (involving reconsideration and modification) | Synonyms: revision |
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| (noun) the act of making something different (as e.g. the size of a garment) | Synonyms: adjustment, modification |
| (noun) an event that occurs when something passes from one state or phase to another | Synonyms: change, modification |
| altostratus | (noun) a stratus cloud at an intermediate altitude of 2 or 3 miles | Synonyms: altostratus cloud |
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| amelioration | (noun) the act of relieving ills and changing for the better | Synonyms: betterment, melioration |
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| apparatchik | (noun) a communist who was a member of the administrative system of a communist party | - |
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| (noun) a humorous but derogatory term for an official of a large organization (especially a political organization) | - |
| apparatus | (noun) equipment designed to serve a specific function | Synonyms: setup |
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| (noun) (anatomy) a group of body parts that work together to perform a given function | - |
| arbitration | (noun) the act of deciding as an arbiter; giving authoritative judgment | Synonyms: arbitrament, arbitrement |
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| (noun) (law) the hearing and determination of a dispute by an impartial referee agreed to by both parties (often used to settle disputes between labor and management) | - |
| arbitrator | (noun) someone chosen to judge and decide a disputed issue | Synonyms: arbiter, umpire |
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| aristocrat | (noun) a member of the aristocracy | Synonyms: blue blood, patrician |
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| aristocratism | (noun) the principles, practices or characteristics of aristocracy. | - |
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| aspirate | (noun) a consonant pronounced with aspiration | - |
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| (noun) a speech sound having as an obvious concomitant an audible puff of breath, as initial stop consonants or initial h -sounds. | - |
| aspiration | (noun) the act of inhaling; the drawing in of air (or other gases) as in breathing | Synonyms: breathing in, inhalation, inspiration, intake |
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| (noun) a will to succeed | - |
| (noun) a manner of articulation involving an audible release of breath | - |
| (noun) a cherished desire | Synonyms: ambition, dream |
| aspirator | (noun) a pump that draws air or another gas through a liquid | - |
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| asseveration | (noun) a declaration that is made emphatically (as if no supporting evidence were necessary) | Synonyms: assertion, averment |
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| asseverator | (noun) someone who claims to speak the truth | Synonyms: affirmer, asserter, avower, declarer |
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| autocrat | (noun) a cruel and oppressive dictator | Synonyms: despot, tyrant |
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| baccarat | (noun) a card game played in casinos in which two or more punters gamble against the banker; the player wins who holds 2 or 3 cards that total closest to nine | Synonyms: chemin de fer |
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| backscratcher | (noun) a long-handled scratcher for scratching your back | - |
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| (noun) someone who is willing to trade favors or services for mutual advantage | - |
| barbiturate | (noun) organic compound having powerful soporific effect; overdose can be fatal | - |
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| barrater | (noun) someone guilty of barratry | Synonyms: barrator |
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| barrator | (noun) someone guilty of barratry | Synonyms: barrater |
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| barratry | (noun) the offense of vexatiously persisting in inciting lawsuits and quarrels | - |
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| (noun) (maritime law) a fraudulent breach of duty by the master of a ship that injures the owner of the ship or its cargo; includes every breach of trust such as stealing or sinking or deserting the ship or embezzling the cargo | - |
| (noun) the crime of a judge whose judgment is influenced by bribery | - |
| (noun) traffic in ecclesiastical offices or preferments | Synonyms: simony |
| berating | (noun) a severe rebuke | Synonyms: blowing up |
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| biquadrate | (noun) an algebraic equation or function of the fourth degree | Synonyms: biquadratic, fourth power, quartic |
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| biquadratic | (noun) a polynomial of the fourth degree | Synonyms: biquadratic polynomial, quartic polynomial |
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| (noun) an equation of the fourth degree | Synonyms: biquadratic equation |
| (noun) an algebraic equation or function of the fourth degree | Synonyms: biquadrate, fourth power, quartic |
| birthrate | (noun) the ratio of live births in an area to the population of that area; expressed per 1000 population per year | Synonyms: birth rate, fertility, fertility rate, natality |
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| bitartrate | (noun) an acid tartrate; a hydrogen tartrate | - |
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| borate | (noun) a salt or ester of boric acid | - |
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| botheration | (noun) something or someone that causes trouble; a source of unhappiness | Synonyms: annoyance, bother, infliction, nuisance, pain, pain in the ass, pain in the neck |
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| (noun) the psychological state of being irritated or annoyed | Synonyms: annoyance, irritation, vexation |
| brat | (noun) a very troublesome child | Synonyms: holy terror, little terror, terror |
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| (noun) a small pork sausage | Synonyms: bratwurst |
| brattice | (noun) a partition (often temporary) of planks or cloth that is used to control ventilation in a mine | - |
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| brattiness | (noun) The state or condition of acting like a brat, being unruly and impolite. | - |
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| bratwurst | (noun) a small pork sausage | Synonyms: brat |
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| bureaucrat | (noun) an official of a bureaucracy | Synonyms: administrative official |
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| bureaucratism | (noun) nonelective government officials | Synonyms: bureaucracy |
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| calibration | (noun) the act of checking or adjusting (by comparison with a standard) the accuracy of a measuring instrument | Synonyms: standardisation, standardization |
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| carat | (noun) a unit of weight for precious stones = 200 mg | - |
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| (noun) the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold | Synonyms: karat, kt |
| carbohydrate | (noun) an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain | Synonyms: saccharide, sugar |
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| castrate | (noun) a man who has been castrated and is incapable of reproduction | Synonyms: eunuch |
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| castration | (noun) neutering a male animal by removing the testicles | Synonyms: emasculation |
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| (noun) surgical removal of the testes or ovaries (usually to inhibit hormone secretion in cases of breast cancer in women or prostate cancer in men) | - |
| (noun) the deletion of objectionable parts from a literary work | Synonyms: expurgation |
| castrato | (noun) a male singer who was castrated before puberty and retains a soprano or alto voice | - |
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| celebrater | (noun) a person who is celebrating | Synonyms: celebrant, celebrator |
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| celebration | (noun) any joyous diversion | Synonyms: festivity |
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| (noun) the public performance of a sacrament or solemn ceremony with all appropriate ritual | Synonyms: solemnisation, solemnization |
| (noun) a joyful occasion for special festivities to mark some happy event | Synonyms: jubilation |
| celebrator | (noun) a person who is celebrating | Synonyms: celebrant, celebrater |
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| cerate | (noun) a hard medicated paste made of lard or oil mixed with wax or resin | - |
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| ceratin | (noun) a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves | Synonyms: keratin |
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| ceratodus | (noun) extinct lungfish | - |
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| ceratopsian | (noun) any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia | Synonyms: horned dinosaur |
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| ceratosaur | (noun) primitive medium-sized theropod; swift-running bipedal carnivorous dinosaur having grasping hands with sharp claws and a short horn between the nostrils; Jurassic in North America | Synonyms: ceratosaurus |
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| ceratosaurus | (noun) primitive medium-sized theropod; swift-running bipedal carnivorous dinosaur having grasping hands with sharp claws and a short horn between the nostrils; Jurassic in North America | Synonyms: ceratosaur |
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| ceratozamia | (noun) a small cycad of the genus Ceratozamia having a short scaly woody trunk and fernlike foliage and woody cones; Mexico | - |
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| cerebration | (noun) the process of using your mind to consider something carefully | Synonyms: intellection, mentation, thinking, thought, thought process |
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| chlorate | (noun) any salt of chloric acid | - |
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| cirrostratus | (noun) a thin uniform layer of hazy cloud at high altitude | Synonyms: cirrostratus cloud |
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| citrate | (noun) a salt or ester of citric acid | - |
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| clofibrate | (noun) a drug (trade name Atromid-S) that reduces lipids in the blood serum; used to treat some cardiovascular diseases | Synonyms: Atromid-S |
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| coconspirator | (noun) a member of a conspiracy | Synonyms: conspirator, machinator, plotter |
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| coelenterate | (noun) radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms | Synonyms: cnidarian |
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| collaboration | (noun) act of working jointly | Synonyms: coaction |
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| (noun) act of cooperating traitorously with an enemy that is occupying your country | Synonyms: collaborationism, quislingism |
| collaborationism | (noun) act of cooperating traitorously with an enemy that is occupying your country | Synonyms: collaboration, quislingism |
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| collaborationist | (noun) someone who collaborates with an enemy occupying force | Synonyms: collaborator, quisling |
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| collaborator | (noun) an associate in an activity or endeavor or sphere of common interest | Synonyms: cooperator, pardner, partner |
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| (noun) someone who collaborates with an enemy occupying force | Synonyms: collaborationist, quisling |
| (noun) someone who assists in a plot | Synonyms: confederate, henchman, partner in crime |
| coloration | (noun) choice and use of colors (as by an artist) | Synonyms: colouration |
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| (noun) appearance with regard to color | Synonyms: colouration |
| (noun) the timbre of a musical sound | Synonyms: color, colour, colouration |
| coloratura | (noun) singing with florid ornamentation | - |
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| (noun) a lyric soprano who specializes in coloratura vocal music | Synonyms: coloratura soprano |
| colouration | (noun) choice and use of colors (as by an artist) | Synonyms: coloration |
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| (noun) appearance with regard to color | Synonyms: coloration |
| (noun) the timbre of a musical sound | Synonyms: color, coloration, colour |
| commemoration | (noun) a recognition of meritorious service | Synonyms: memorial, remembrance |
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| (noun) a ceremony to honor the memory of someone or something | Synonyms: memorialisation, memorialization |
| commemorative | (noun) an object (such as a coin or postage stamp) made to mark an event or honor a person | - |
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| commensurateness | (noun) the relation of corresponding in degree or size or amount | Synonyms: correspondence, proportionateness |
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| commiseration | (noun) an expression of sympathy with another's grief | Synonyms: condolence |
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| (noun) a feeling of sympathy and sorrow for the misfortunes of others | Synonyms: pathos, pity, ruth |
| comparative | (noun) the comparative form of an adjective or adverb | Synonyms: comparative degree |
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| concentrate | (noun) a concentrated example of something | - |
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| (noun) a concentrated form of a foodstuff; the bulk is reduced by removing water | - |
| (noun) the desired mineral that is left after impurities have been removed from mined ore | Synonyms: dressed ore |
| concentration | (noun) strengthening the concentration (as of a solute in a mixture) by removing diluting material | - |
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| (noun) bringing together military forces | - |
| (noun) great and constant diligence and attention | Synonyms: assiduity, assiduousness |
| (noun) the strength of a solution; number of molecules of a substance in a given volume | - |
| (noun) the spatial property of being crowded together | Synonyms: compactness, denseness, density, tightness |
| (noun) complete attention; intense mental effort | Synonyms: absorption, engrossment, immersion |
| (noun) increase in density | - |
| confederate | (noun) a person who joins with another in carrying out some plan (especially an unethical or illegal plan) | Synonyms: accomplice |
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| (noun) someone who assists in a plot | Synonyms: collaborator, henchman, partner in crime |
| confederation | (noun) the act of forming an alliance or confederation | Synonyms: alliance |
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| (noun) a union of political organizations | Synonyms: confederacy, federation |
| (noun) the state of being allied or confederated | Synonyms: alliance |
| configuration | (noun) any spatial attributes (especially as defined by outline) | Synonyms: conformation, contour, form, shape |
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| (noun) an arrangement of parts or elements | Synonyms: constellation |
| configurationism | (noun) (psychology) a theory of psychology that emphasizes the importance of configurational properties | Synonyms: Gestalt psychology |
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| conflagration | (noun) a very intense and uncontrolled fire | Synonyms: inferno |
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| conglomerate | (noun) a group of diverse companies under common ownership and run as a single organization | Synonyms: empire |
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| (noun) a composite rock made up of particles of varying size | Synonyms: pudding stone |