| autoradiographic | (adjective) of or relating to or produced by autoradiography | - |
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| autoradiography | (noun) producing a radiograph by means of the radiation emitted from the specimen being photographed | - |
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| autoregulation | (noun) (physiology) processes that maintain a generally constant physiological state in a cell or organism | - |
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| aviator | (noun) someone who operates an aircraft | Synonyms: aeronaut, flier, flyer |
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| barnstorm | (verb) tour the country making political speeches, giving lectures, or presenting plays | - |
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| (verb) appear at county fairs and carnivals as a stunt flier and parachute jumper | - |
| barnstormer | (noun) a pilot who travels around the country giving exhibits of stunt flying and parachuting | Synonyms: stunt flier, stunt pilot |
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| (noun) an actor who travels around the country presenting plays | Synonyms: play-actor, playactor, trouper |
| baroreceptor | (noun) a sensory receptor that responds to pressure | - |
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| barrator | (noun) someone guilty of barratry | Synonyms: barrater |
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| benedictory | (adjective) expressing benediction | Synonyms: benedictive |
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| benefactor | (noun) a person who helps people or institutions (especially with financial help) | Synonyms: helper |
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| bettor | (noun) someone who bets | Synonyms: better, punter, wagerer |
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| bimotored | (adjective) having two motors | - |
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| blowtorch | (noun) a burner that mixes air and gas to produce a very hot flame | Synonyms: blowlamp, torch |
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| bookstore | (noun) a shop where books are sold | Synonyms: bookshop, bookstall |
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| brainstorm | (noun) the clear (and often sudden) understanding of a complex situation | Synonyms: brainwave, insight |
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| (verb) try to solve a problem by thinking intensely about it | - |
| brainstorming | (noun) a group problem-solving technique in which members spontaneously share ideas and solutions | - |
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| bronchodilator | (noun) a drug that relaxes and dilates the bronchial passageways and improves the passages of air into the lungs | - |
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| calculator | (noun) a small machine that is used for mathematical calculations; can be mechanical or electronic | Synonyms: calculating machine |
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| (noun) an expert at calculation (or at operating calculating machines) | Synonyms: computer, estimator, figurer, reckoner |
| calefactory | (adjective) serving to heat | Synonyms: calefactive |
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| calorisator | (noun) an apparatus used in beet-sugar factories to heat the juice in order to aid the diffusion. | Synonyms: calorizator |
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| calorizator | (noun) an apparatus used in beet-sugar factories to heat the juice in order to aid the diffusion. | Synonyms: calorisator |
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| calumniatory | (adjective) (used of statements) harmful and often untrue; tending to discredit or malign | Synonyms: calumnious, defamatory, denigrating, denigrative, denigratory, libellous, libelous, slanderous |
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| cantor | (noun) the official of a synagogue who conducts the liturgical part of the service and sings or chants the prayers intended to be performed as solos | Synonyms: hazan |
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| (noun) the musical director of a choir | Synonyms: choirmaster, precentor |
| capacitor | (noun) an electrical device characterized by its capacity to store an electric charge | Synonyms: capacitance, condenser, electrical condenser |
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| captor | (noun) a person who captures and holds people or animals | Synonyms: capturer |
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| 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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| cardiorespiratory | (adjective) of or pertaining to or affecting both the heart and the lungs and their functions | Synonyms: cardiopulmonary |
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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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| celebratory | (adjective) used for celebrating | - |
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| certificatory | (adjective) serving to certify or endorse authoritatively | - |
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| 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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| chylifactory | (adjective) producing or converting into chyle | Synonyms: chylifactive, chylific |
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| circulatory | (adjective) relating to circulatory system or to circulation of the blood | - |
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| (adjective) of or relating to circulation | Synonyms: circulative |
| circumlocutory | (adjective) roundabout and unnecessarily wordy | Synonyms: ambagious, circumlocutious, periphrastic |
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| clamatorial | (adjective) of or relating to Clamatores | - |
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| classificatory | (adjective) relating to or involving classification | - |
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| clearstory | (noun) part of an interior wall rising above the adjacent roof with windows admitting light | Synonyms: clerestory |
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| clerestory | (noun) part of an interior wall rising above the adjacent roof with windows admitting light | Synonyms: clearstory |
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| clitoral | (adjective) of or relating to the clitoris | Synonyms: clitoric |
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| clitoric | (adjective) of or relating to the clitoris | Synonyms: clitoral |
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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 | - |
| combinatorial | (adjective) relating to the combination and arrangement of elements in sets | - |
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| (adjective) relating to or involving combinations | Synonyms: combinative, combinatory |
| combinatory | (adjective) marked by or relating to or resulting from combination | Synonyms: combinative |
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| (adjective) relating to or involving combinations | Synonyms: combinative, combinatorial |
| (adjective) able to or tending to combine | Synonyms: combinable, combinational |
| 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 |
| comminatory | (adjective) containing warning of punishment | Synonyms: denunciative, denunciatory |
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| communicator | (noun) a person who communicates with others | - |
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| communicatory | (adjective) able or tending to communicate | Synonyms: communicative |
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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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| competitory | (adjective) involving competition or competitiveness | Synonyms: competitive |
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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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| 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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| 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 | - |
| 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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| 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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| 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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| 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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| consultatory | (adjective) giving advice | Synonyms: advisory, consultative, consultive |
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| contort | (verb) twist and press out of shape | Synonyms: deform, distort, wring |
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| contorted | (adjective) twisted (especially as in pain or struggle) | Synonyms: writhed, writhen |
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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 |
| contradictorily | (adverb) in a contradictory manner | - |
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| contradictoriness | (noun) the relation that exists when opposites cannot coexist | - |
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| contradictory | (adjective) of words or propositions so related that both cannot be true and both cannot be false | - |
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| (adjective) unable for both to exist or be true at the same time | Synonyms: mutually exclusive |
| (adjective) in disagreement | Synonyms: at odds, conflicting, self-contradictory |
| (adjective) that confounds or contradicts or confuses | Synonyms: confounding |
| (noun) two propositions are contradictories if both cannot be true (or both cannot be false) at the same time | - |
| 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 | - |
| contributory | (adjective) tending to bring about; being partly responsible for | Synonyms: conducive, contributing, contributive, tributary |
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| 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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| 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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