| carbonator | (noun) a device that carries out carbonation. | Synonyms: soda carbonator, soda maker |
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| carburetor | (noun) mixes air with gasoline vapor prior to explosion | Synonyms: carburettor |
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| carburettor | (noun) mixes air with gasoline vapor prior to explosion | Synonyms: carburetor |
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| castor | (noun) a hat made with the fur of a beaver (or similar material) | Synonyms: beaver |
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| (noun) a pivoting roller attached to the bottom of furniture or trucks or portable machines to make them movable | Synonyms: caster |
| (noun) a shaker with a perforated top for sprinkling powdered sugar | Synonyms: caster |
| celebrator | (noun) a person who is celebrating | Synonyms: celebrant, celebrater |
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| censor | (noun) a person who is authorized to read publications or correspondence or to watch theatrical performances and suppress in whole or in part anything considered obscene or politically unacceptable | - |
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| (noun) someone who censures or condemns | - |
| chador | (noun) a cloth used as a head covering (and veil and shawl) by Muslim and Hindu women | Synonyms: chadar, chaddar, chuddar |
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| chancellor | (noun) the person who is head of government (in several countries) | Synonyms: premier, prime minister |
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| (noun) the honorary or titular head of a university | - |
| chemoreceptor | (noun) a sensory receptor that responds to chemical stimuli | - |
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| chiropractor | (noun) a therapist who practices chiropractic | - |
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| clamor | (noun) loud and persistent outcry from many people | Synonyms: clamoring, clamour, clamouring, hue and cry |
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| (noun) a loud harsh or strident noise | Synonyms: blare, blaring, cacophony, din |
| clangor | (noun) a loud resonant repeating noise | Synonyms: clang, clangoring, clangour, clank, clash, crash |
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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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| coauthor | (noun) a writer who collaborates with others in writing something | Synonyms: joint author |
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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 | - |
| color | (noun) a visual attribute of things that results from the light they emit or transmit or reflect | Synonyms: coloring, colour, colouring |
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| (noun) the appearance of objects (or light sources) described in terms of a person's perception of their hue and lightness (or brightness) and saturation | Synonyms: colour |
| (noun) the timbre of a musical sound | Synonyms: coloration, colour, colouration |
| (noun) interest and variety and intensity | Synonyms: colour, vividness |
| (noun) an outward or token appearance or form that is deliberately misleading | Synonyms: colour, gloss, semblance |
| (noun) (physics) the characteristic of quarks that determines their role in the strong interaction | Synonyms: colour |
| (noun) any material used for its color | Synonyms: coloring material, colour, colouring material |
| 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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| compressor | (noun) a mechanical device that compresses gasses | - |
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| (noun) an electronic device that reduces the dynamic range of an audio signal. | - |
| conciliator | (noun) someone who tries to bring peace | Synonyms: make-peace, pacifier, peacemaker, reconciler |
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| condor | (noun) the largest flying birds in the western hemisphere | - |
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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 | - |
| confessor | (noun) a priest who hears confession and gives absolution | - |
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| (noun) someone who confesses (discloses information damaging to themselves) | - |
| 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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| conjuror | (noun) a witch doctor who practices conjury | Synonyms: conjure man, conjurer |
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| (noun) someone who performs magic tricks to amuse an audience | Synonyms: conjurer, illusionist, magician, prestidigitator |
| connector | (noun) an instrumentality that connects | Synonyms: connecter, connection, connective, connexion |
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| conqueror | (noun) someone who is victorious by force of arms | Synonyms: vanquisher |
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| conquistador | (noun) an adventurer (especially one who led the Spanish conquest of Mexico and Peru in the 16th century) | - |
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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 | - |
| consignor | (noun) the person who delivers over or commits merchandise | Synonyms: consigner |
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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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| 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 |
| 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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| conveyor | (noun) a moving belt that transports objects (as in a factory) | Synonyms: conveyer, conveyer belt, conveyor belt, transporter |
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| (noun) a person who conveys (carries or transmits) | Synonyms: conveyer |
| 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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| corridor | (noun) an enclosed passageway; rooms usually open onto it | - |
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| councillor | (noun) a member of a council | Synonyms: council member |
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| counsellor | (noun) a lawyer who pleads cases in court | Synonyms: advocate, counsel, counselor-at-law, counselor, pleader |
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| (noun) someone who gives advice about problems | Synonyms: counselor |
| (noun) someone who has supervisory duties at a summer camp | Synonyms: counselor |
| counselor | (noun) a lawyer who pleads cases in court | Synonyms: advocate, counsel, counsellor, counselor-at-law, pleader |
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| (noun) someone who gives advice about problems | Synonyms: counsellor |
| (noun) someone who has supervisory duties at a summer camp | Synonyms: counsellor |
| counterdemonstrator | (noun) someone who demonstrates in opposition to another demonstration | - |
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| countertenor | (noun) the highest adult male singing voice | Synonyms: alto |
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| (noun) a male singer with a voice above that of a tenor | - |
| 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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| 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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| cursor | (noun) (computer science) indicator consisting of a movable spot of light (an icon) on a visual display; moving it allows the user to point to commands or screen positions | Synonyms: pointer |
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| cuspidor | (noun) a receptacle for spit (usually in a public place) | Synonyms: spittoon |
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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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| decor | (noun) decoration consisting of the layout and furnishings of a livable interior | Synonyms: interior decoration |
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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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| 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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| demeanor | (noun) (behavioral attributes) the way a person behaves toward other people | Synonyms: behavior, behaviour, conduct, demeanour, deportment |
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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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| depositor | (noun) a person who has deposited money in a bank or similar institution | - |
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| depreciator | (noun) one who disparages or belittles the worth of something | Synonyms: detractor, disparager, knocker |
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| depressor | (noun) a device used by physician to press a part down or aside | - |
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| (noun) any skeletal muscle that draws a body part down | Synonyms: depressor muscle |
| (noun) any nerve whose activity tends to reduce the activity or tone of the body part it serves | Synonyms: depressor nerve |
| 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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| devisor | (noun) someone who devises real property in a will | - |
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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 | - |
| differentiator | (noun) a person who (or that which) differentiates | Synonyms: discriminator |
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| diffusor | (noun) optical device that distributes the light of a lamp evenly | Synonyms: diffuser |
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| (noun) baffle that distributes sound waves evenly | Synonyms: diffuser |
| 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 | - |
| 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 |
| 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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| disfavor | (noun) an inclination to withhold approval from some person or group | Synonyms: disapproval, disfavour, dislike |
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| (noun) the state of being out of favor | Synonyms: disfavour |
| dishonor | (noun) lacking honor or integrity | Synonyms: dishonour |
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| (noun) a state of shame or disgrace | Synonyms: dishonour |
| 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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| 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 |