| commutator | (noun) switch for reversing the direction of an electric current | - |
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| conciliator | (noun) someone who tries to bring peace | Synonyms: make-peace, pacifier, peacemaker, reconciler |
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| conciliatory | (adjective) intended to placate | Synonyms: conciliative |
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| (adjective) making or willing to make concessions | Synonyms: compromising, flexible |
| condemnatory | (adjective) containing or imposing condemnation or censure | Synonyms: condemning |
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| confirmatory | (adjective) serving to support or corroborate | Synonyms: collateral, confirmative, confirming, corroborative, corroboratory, substantiating, substantiative, validating, validatory, verificatory, verifying |
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| congenator | (noun) an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus) | Synonyms: congener, congeneric, relative |
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| congratulatory | (adjective) expressive of sympathetic pleasure or joy on account of someone's success or good fortune | Synonyms: gratulatory |
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| conservator | (noun) the custodian of a collection (as a museum or library) | Synonyms: curator |
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| (noun) someone appointed by a court to assume responsibility for the interests of a minor or incompetent person | - |
| conservatory | (noun) a greenhouse in which plants are arranged in a pleasing manner | Synonyms: hothouse, indoor garden |
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| (noun) a schoolhouse with special facilities for fine arts | Synonyms: conservatoire |
| (noun) the faculty and students of a school specializing in one of the fine arts | - |
| consolatory | (adjective) affording comfort or solace | Synonyms: comforting, consoling |
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| conspirator | (noun) a member of a conspiracy | Synonyms: coconspirator, machinator, plotter |
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| conspiratorial | (adjective) relating to or characteristic of conspiracy or conspirators | Synonyms: conspirative |
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| consultatory | (adjective) giving advice | Synonyms: advisory, consultative, consultive |
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| cooperator | (noun) an associate in an activity or endeavor or sphere of common interest | Synonyms: collaborator, pardner, partner |
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| coordinator | (noun) someone whose task is to see that work goes harmoniously | Synonyms: co-ordinator |
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| copulatory | (adjective) of or relating to coitus or copulation | Synonyms: coital |
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| corroboratory | (adjective) serving to support or corroborate | Synonyms: collateral, confirmative, confirmatory, confirming, corroborative, substantiating, substantiative, validating, validatory, verificatory, verifying |
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| cosignatory | (adjective) signing jointly with others | - |
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| (noun) one of two or more signers of the same document (as a treaty or declaration) | Synonyms: cosigner |
| counterdemonstrator | (noun) someone who demonstrates in opposition to another demonstration | - |
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| creator | (noun) a person who grows or makes or invents things | - |
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| crematorium | (noun) a furnace where a corpse can be burned and reduced to ashes | Synonyms: cremation chamber, crematory |
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| (noun) a mortuary where corpses are cremated | Synonyms: crematory |
| crematory | (noun) a furnace where a corpse can be burned and reduced to ashes | Synonyms: cremation chamber, crematorium |
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| (noun) a mortuary where corpses are cremated | Synonyms: crematorium |
| criminatory | (adjective) charging or suggestive of guilt or blame | Synonyms: criminative, incriminating, incriminatory |
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| cultivator | (noun) a farm implement used to break up the surface of the soil (for aeration and weed control and conservation of moisture) | Synonyms: tiller |
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| (noun) someone concerned with the science or art or business of cultivating the soil | Synonyms: agriculturalist, agriculturist, grower, raiser |
| cunctator | (noun) someone who postpones work (especially out of laziness or habitual carelessness) | Synonyms: postponer, procrastinator |
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| curator | (noun) the custodian of a collection (as a museum or library) | Synonyms: conservator |
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| curatorial | (adjective) of or relating to a curator or the duties of a curator | - |
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| curatorship | (noun) the position of curator | - |
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| damnatory | (adjective) threatening with damnation | Synonyms: damning |
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| declamatory | (adjective) ostentatiously lofty in style | Synonyms: bombastic, large, orotund, tumid, turgid |
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| declaratory | (adjective) relating to the use of or having the nature of a declaration | Synonyms: asserting, declarative |
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| decorator | (noun) someone who decorates | Synonyms: ornamentalist |
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| (noun) a person who specializes in interior decoration | Synonyms: house decorator, interior decorator, room decorator |
| defalcator | (noun) someone who violates a trust by taking (money) for his own use | Synonyms: embezzler, peculator |
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| defamatory | (adjective) (used of statements) harmful and often untrue; tending to discredit or malign | Synonyms: calumniatory, calumnious, denigrating, denigrative, denigratory, libellous, libelous, slanderous |
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| defecator | (noun) (obsolete) that which cleanses or purifies; especially, an apparatus for removing the feculencies of juices and syrups. | - |
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| (noun) a person who defecates | Synonyms: shitter, voider |
| defibrillator | (noun) an electronic device that administers an electric shock of preset voltage to the heart through the chest wall in an attempt to restore the normal rhythm of the heart during ventricular fibrillation | - |
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| deflator | (noun) a statistical factor designed to remove the effect of inflation; inflation adjusted variables are in constant dollars | - |
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| defoliator | (noun) an insect that strips the leaves from plants | - |
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| demodulator | (noun) rectifier that extracts modulation from a radio carrier wave | Synonyms: detector |
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| demonstrator | (noun) someone who participates in a public display of group feeling | Synonyms: protester |
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| (noun) someone who demonstrates an article to a prospective buyer | Synonyms: sales demonstrator |
| (noun) a teacher or teacher's assistant who demonstrates the principles that are being taught | - |
| denigratory | (adjective) (used of statements) harmful and often untrue; tending to discredit or malign | Synonyms: calumniatory, calumnious, defamatory, denigrating, denigrative, libellous, libelous, slanderous |
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| denitrator | (noun) Any device used to remove nitrates or other nitrogen compounds, especially from water. | - |
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| denominator | (noun) the divisor of a fraction | - |
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| denunciatory | (adjective) containing warning of punishment | Synonyms: comminatory, denunciative |
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| depilator | (noun) a cosmetic for temporary removal of undesired hair | Synonyms: depilatory, epilator |
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| depilatory | (adjective) able to remove hair or render hairless | - |
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| (noun) a cosmetic for temporary removal of undesired hair | Synonyms: depilator, epilator |
| (noun) a chemical (usually a sulfide) used to remove hair or wool or bristles from hides | - |
| deprecatory | (adjective) tending to diminish or disparage | Synonyms: belittling, deprecating, deprecative, depreciative, depreciatory, slighting |
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| depreciator | (noun) one who disparages or belittles the worth of something | Synonyms: detractor, disparager, knocker |
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| depreciatory | (adjective) tending to decrease or cause a decrease in value | Synonyms: depreciating, depreciative |
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| (adjective) tending to diminish or disparage | Synonyms: belittling, deprecating, deprecative, deprecatory, depreciative, slighting |
| derogatory | (adjective) expressive of low opinion | Synonyms: derogative, disparaging |
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| detonator | (noun) a mechanical or electrical explosive device or a small amount of explosive; can be used to initiate the reaction of a disrupting explosive | Synonyms: cap, detonating device |
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| dextrorotatory | (adjective) rotating to the right | Synonyms: dextrorotary, right-handed |
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| dictator | (noun) a ruler who is unconstrained by law | Synonyms: potentate |
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| (noun) a person who behaves in a tyrannical manner | Synonyms: authoritarian |
| (noun) a speaker who dictates to a secretary or a recording machine | - |
| dictatorial | (adjective) of or characteristic of a dictator | - |
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| (adjective) expecting unquestioning obedience | Synonyms: authoritarian, overbearing |
| (adjective) characteristic of an absolute ruler or absolute rule; having absolute sovereignty | Synonyms: authoritarian, autocratic, despotic, tyrannic, tyrannical |
| dictatorially | (adverb) in an overbearingly domineering manner; as a dictator | Synonyms: autocratically, magisterially |
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| dictatorship | (noun) a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.) | Synonyms: absolutism, authoritarianism, Caesarism, despotism, monocracy, one-man rule, shogunate, Stalinism, totalitarianism, tyranny |
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| differentiator | (noun) a person who (or that which) differentiates | Synonyms: discriminator |
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| dilator | (noun) a surgical instrument that is used to dilate or distend an opening or an organ | Synonyms: dilater |
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| (noun) a drug that causes dilation | - |
| (noun) a muscle or nerve that dilates or widens a body part | - |
| dilatoriness | (noun) slowness as a consequence of not getting around to it | Synonyms: procrastination |
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| dilatory | (adjective) wasting time | Synonyms: laggard, pokey, poky |
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| disambiguator | (noun) (computer science) a natural language processing application that tries to determine the intended meaning of a word or phrase by examining the linguistic context in which it is used | - |
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| discriminator | (noun) a person who (or that which) differentiates | Synonyms: differentiator |
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| discriminatory | (adjective) being biased or having a belief or attitude formed beforehand | Synonyms: prejudiced |
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| (adjective) manifesting partiality | Synonyms: preferential |
| (adjective) capable of making fine distinctions | Synonyms: discriminative |
| (adjective) containing or implying a slight or showing prejudice | Synonyms: invidious |
| disseminator | (noun) someone who spreads the news | Synonyms: propagator |
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| dissimulator | (noun) a person who professes beliefs and opinions that he or she does not hold in order to conceal his or her real feelings or motives | Synonyms: dissembler, hypocrite, phoney, phony, pretender |
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| divinatory | (adjective) resembling or characteristic of a prophet or prophecy | Synonyms: mantic, sibyllic, sibylline, vatic, vatical |
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| (adjective) based primarily on surmise rather than adequate evidence | Synonyms: conjectural, hypothetic, hypothetical, supposed, suppositional, suppositious, supposititious |
| duplicator | (noun) apparatus that makes copies of typed, written or drawn material | Synonyms: copier |
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| educator | (noun) someone who educates young people | Synonyms: pedagog, pedagogue |
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| ejaculator | (noun) a speaker who utters a sudden exclamation | - |
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| (noun) a man who ejaculates semen | - |
| elevator | (noun) lifting device consisting of a platform or cage that is raised and lowered mechanically in a vertical shaft in order to move people from one floor to another in a building | Synonyms: lift |
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| (noun) the airfoil on the tailplane of an aircraft that makes it ascend or descend | - |
| eliminator | (noun) an agent that eliminates something | - |
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| emancipator | (noun) someone who frees others from bondage | Synonyms: manumitter |
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| emulator | (noun) someone who copies the words or behavior of another | Synonyms: ape, aper, copycat, imitator |
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| enumerator | (noun) someone who collects census data by visiting individual homes | Synonyms: census taker |
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| epilator | (noun) a cosmetic for temporary removal of undesired hair | Synonyms: depilator, depilatory |
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| epistolatory | (adjective) written in the form of or carried on by letters or correspondence | Synonyms: epistolary |
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| equator | (noun) an imaginary line around the Earth forming the great circle that is equidistant from the north and south poles | - |
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| (noun) a circle dividing a sphere or other surface into two usually equal and symmetrical parts | - |
| equatorial | (adjective) of or existing at or near the geographic equator | - |
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| (adjective) of or relating to conditions at the geographical equator | - |
| (adjective) of or relating to or at an equator | - |
| (noun) a telescope whose mounting has only two axes of motion, one parallel to the Earth's axis and the other one at right angles to it | - |
| equivocator | (noun) a respondent who avoids giving a clear direct answer | Synonyms: hedger, tergiversator |
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| eradicator | (noun) someone who exterminates (especially someone whose occupation is the extermination of troublesome rodents and insects) | Synonyms: exterminator, terminator |
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| escalator | (noun) a stairway whose steps move continuously on a circulating belt | Synonyms: moving staircase, moving stairway |
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| (noun) a clause in a contract that provides for an increase or a decrease in wages or prices or benefits etc. depending on certain conditions (as a change in the cost of living index) | Synonyms: escalator clause |
| estimator | (noun) an expert at calculation (or at operating calculating machines) | Synonyms: calculator, computer, figurer, reckoner |
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| evaluator | (noun) an authority who is able to estimate worth or quality | Synonyms: judge |
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| excavator | (noun) a machine for excavating | Synonyms: digger, power shovel, shovel |
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| (noun) a workman who excavates for foundations of buildings or for quarrying | - |
| excitatory | (adjective) (of drugs e.g.) able to excite or stimulate | Synonyms: excitant, excitative |
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| exclamatory | (adjective) sudden and strong | Synonyms: emphatic |
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| excogitator | (noun) a thinker who considers carefully and thoroughly | - |
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| exculpatory | (adjective) clearing of guilt or blame | - |
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| excusatory | (adjective) offering or expressing apology | Synonyms: apologetic |
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| exhortatory | (adjective) giving strong encouragement | Synonyms: exhortative, hortative, hortatory |
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| expectorator | (noun) a medicine promoting expectoration | Synonyms: expectorant |
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| (noun) a person who spits (ejects saliva or phlegm from the mouth) | Synonyms: spitter |
| expiatory | (adjective) having power to atone for or offered by way of expiation or propitiation | Synonyms: expiative, propitiatory |
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| expiratory | (adjective) of or relating to the breathing out phase of respiration | - |
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| explanatory | (adjective) serving or intended to explain or make clear | - |
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| exploitatory | (adjective) tending to exploit or make use of | Synonyms: exploitative, exploitive |
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| exploratory | (adjective) serving in or intended for exploration or discovery | Synonyms: explorative |
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| expurgator | (noun) a person who edits a text by removing obscene or offensive words or passages | Synonyms: bowdleriser, bowdlerizer |
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| exterminator | (noun) someone who exterminates (especially someone whose occupation is the extermination of troublesome rodents and insects) | Synonyms: eradicator, terminator |
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| extirpator | (noun) a farm implement used to remove weeds. | - |
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| fabricator | (noun) someone who tells lies | Synonyms: fibber, storyteller |
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