| clerestory | (noun) part of an interior wall rising above the adjacent roof with windows admitting light | Synonyms: clearstory |
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| clitoridectomy | (noun) excision of the clitoris | Synonyms: female circumcision |
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| clitoris | (noun) a female sexual organ homologous to the penis | Synonyms: button, clit |
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| coadjutor | (noun) an assistant to a bishop | - |
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| coagulator | (noun) an agent that produces coagulation | Synonyms: coagulant |
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| coconspirator | (noun) a member of a conspiracy | Synonyms: conspirator, machinator, plotter |
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| cofactor | (noun) a substance (as a coenzyme) that must join with another to produce a given result | - |
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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 |
| collator | (noun) a machine that selects, merges and matches decks of punch cards. | - |
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| collector | (noun) the electrode in a transistor through which a primary flow of carriers leaves the region between the electrodes | - |
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| (noun) a crater that has collected cosmic material hitting the earth | - |
| (noun) a person who is employed to collect payments (as for rent or taxes) | Synonyms: accumulator, gatherer |
| (noun) a person who collects things | Synonyms: aggregator |
| collimator | (noun) optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens; light rays leave the slit as a parallel beam | - |
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| (noun) a small telescope attached to a large telescope to use in setting the line of the larger one | - |
| commentator | (noun) a writer who reports and analyzes events of the day | Synonyms: reviewer |
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| (noun) an expert who observes and comments on something | Synonyms: observer |
| communicator | (noun) a person who communicates with others | - |
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| commutator | (noun) switch for reversing the direction of an electric current | - |
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| competitor | (noun) the contestant you hope to defeat | Synonyms: challenger, competition, contender, rival |
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| compositor | (noun) one who sets written material into type | Synonyms: setter, typesetter, typographer |
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| conciliator | (noun) someone who tries to bring peace | Synonyms: make-peace, pacifier, peacemaker, reconciler |
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| conductor | (noun) a device designed to transmit electricity, heat, etc. | - |
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| (noun) the person who leads a musical group | Synonyms: director, music director |
| (noun) the person who collects fares on a public conveyance | - |
| (noun) a substance that readily conducts e.g. electricity and heat | - |
| 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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| connector | (noun) an instrumentality that connects | Synonyms: connecter, connection, connective, connexion |
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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 | - |
| consistory | (noun) a church tribunal or governing body | - |
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| conspirator | (noun) a member of a conspiracy | Synonyms: coconspirator, machinator, plotter |
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| constrictor | (noun) any of various large nonvenomous snakes that kill their prey by crushing it in its coils | - |
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| constructor | (noun) someone who contracts for and supervises construction (as of a building) | Synonyms: builder |
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| contortion | (noun) the act of twisting or deforming the shape of something (e.g., yourself) | Synonyms: deformation |
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| (noun) a tortuous and twisted shape or position | Synonyms: crookedness, torsion, tortuosity, tortuousness |
| contortionist | (noun) an acrobat able to twist into unusual positions | - |
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| contractor | (noun) a bodily organ that contracts | Synonyms: contractile organ |
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| (noun) someone (a person or firm) who contracts to build things | - |
| (noun) (law) a party to a contract | - |
| (noun) the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps | Synonyms: declarer |
| contradictoriness | (noun) the relation that exists when opposites cannot coexist | - |
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| contradictory | (noun) two propositions are contradictories if both cannot be true (or both cannot be false) at the same time | - |
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| contributor | (noun) someone who contributes (or promises to contribute) a sum of money | Synonyms: subscriber |
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| (noun) a writer whose work is published in a newspaper or magazine or as part of a book | - |
| convector | (noun) a space heater that transfers heat to the surrounding air by convection | - |
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| convertor | (noun) a device for changing one substance or form or state into another | Synonyms: converter |
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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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| cosignatory | (noun) one of two or more signers of the same document (as a treaty or declaration) | Synonyms: cosigner |
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| 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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| creditor | (noun) a person to whom money is owed by a debtor; someone to whom an obligation exists | - |
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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 |
| cryptorchidism | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidy, cryptorchism |
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| cryptorchidy | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidism, cryptorchism |
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| cryptorchism | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidism, cryptorchidy |
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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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| curatorship | (noun) the position of curator | - |
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| debitor | (noun) a person who owes a creditor; someone who has the obligation of paying a debt | Synonyms: debtor |
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| debtor | (noun) a person who owes a creditor; someone who has the obligation of paying a debt | Synonyms: debitor |
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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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| 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 |
| defector | (noun) a person who abandons their duty (as on a military post) | Synonyms: deserter |
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| 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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| definitors | (noun) council in a religious order who provide counsel and assistance to the superiors general and provincial superior of their order. | - |
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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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| deflector | (noun) a device intended to turn aside the flow of something (water or air or smoke etc) | - |
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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 | - |
| 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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| depilator | (noun) a cosmetic for temporary removal of undesired hair | Synonyms: depilatory, epilator |
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| depilatory | (noun) a cosmetic for temporary removal of undesired hair | Synonyms: depilator, epilator |
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| (noun) a chemical (usually a sulfide) used to remove hair or wool or bristles from hides | - |
| depositor | (noun) a person who has deposited money in a bank or similar institution | - |
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| depository | (noun) a facility where things can be deposited for storage or safekeeping | Synonyms: deposit, depositary, repository |
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| depreciator | (noun) one who disparages or belittles the worth of something | Synonyms: detractor, disparager, knocker |
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| descriptor | (noun) a piece of stored information that is used to identify an item in an information storage and retrieval system | - |
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| (noun) the phonological or orthographic sound or appearance of a word that can be used to describe or identify something | Synonyms: form, signifier, word form |
| detector | (noun) any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner | Synonyms: sensing element, sensor |
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| (noun) electronic equipment that detects the presence of radio signals or radioactivity | - |
| (noun) rectifier that extracts modulation from a radio carrier wave | Synonyms: demodulator |
| 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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| detractor | (noun) one who disparages or belittles the worth of something | Synonyms: depreciator, disparager, knocker |
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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 | - |
| 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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| director | (noun) someone who controls resources and expenditures | Synonyms: manager, managing director |
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| (noun) the person who leads a musical group | Synonyms: conductor, music director |
| (noun) someone who supervises the actors and directs the action in the production of a show | Synonyms: theater director, theatre director |
| (noun) member of a board of directors | - |
| (noun) the person who directs the making of a film | Synonyms: film director |
| directorate | (noun) a group of persons chosen to govern the affairs of a corporation or other large institution | Synonyms: board of directors |
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| directorship | (noun) the position of a director of a business concern | - |
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| directory | (noun) an alphabetical list of names and addresses | - |
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| (noun) (computer science) a listing of the files stored in memory (usually on a hard disk) | - |
| 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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| disinfector | (noun) an apparatus for applying disinfectants. | - |
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| 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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| distortion | (noun) the act of distorting something so it seems to mean something it was not intended to mean | Synonyms: overrefinement, straining, torture, twisting |
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| (noun) the mistake of misrepresenting the facts | - |
| (noun) a change for the worse | Synonyms: deformation |
| (noun) an optical phenomenon resulting from the failure of a lens or mirror to produce a good image | Synonyms: aberration, optical aberration |
| (noun) a change (usually undesired) in the waveform of an acoustic or analog electrical signal; the difference between two measurements of a signal (as between the input and output signal) | - |
| (noun) a shape resulting from distortion | Synonyms: distorted shape |
| distortionist | (noun) a painter who introduces distortions | - |
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| distributor | (noun) electrical device that distributes voltage to the spark plugs of a gasoline engine in the order of the firing sequence | Synonyms: distributer, electrical distributor |
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| (noun) a company that markets merchandise | - |
| (noun) someone who markets merchandise | Synonyms: distributer |
| (noun) a person with authority to allot or deal out or apportion | Synonyms: allocator |
| doctor | (noun) children take the roles of physician or patient or nurse and pretend they are at the physician's office | - |
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| (noun) a licensed medical practitioner | Synonyms: doc, Dr., MD, medico, physician |
| (noun) a person who holds Ph.D. degree (or the equivalent) from an academic institution | Synonyms: Dr. |
| doctorate | (noun) one of the highest earned academic degrees conferred by a university | Synonyms: doctor's degree |
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| doctorfish | (noun) surgeon fish of the West Indies | Synonyms: Acanthurus chirurgus, doctor-fish |
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| doctorspeak | (noun) medical jargon | - |
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| dormitory | (noun) a college or university building containing living quarters for students | Synonyms: dorm, hall, residence hall, student residence |
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| (noun) a large sleeping room containing several beds | Synonyms: dorm room, dormitory room |
| drugstore | (noun) a retail shop where medicine and other articles are sold | Synonyms: apothecary's shop, chemist's, chemist's shop, pharmacy |
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| duplicator | (noun) apparatus that makes copies of typed, written or drawn material | Synonyms: copier |
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| editor | (noun) (computer science) a program designed to perform such editorial functions as rearrangement or modification or deletion of data | Synonyms: editor program |
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| (noun) a person responsible for the editorial aspects of publication; the person who determines the final content of a text (especially of a newspaper or magazine) | Synonyms: editor in chief |
| editorial | (noun) an article giving opinions or perspectives | Synonyms: column, newspaper column |
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| editorialist | (noun) a journalist who writes editorials | Synonyms: columnist |
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