| claustrophobia | (noun) a morbid fear of being closed in a confined space | - |
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| claustrophobic | (adjective) suffering from claustrophobia; abnormally afraid of closed-in places | - |
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| (adjective) uncomfortably closed or hemmed in | - |
| claustrum | (noun) a layer of grey matter in the brain adjacent to the lenticular nucleus | - |
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| cloistral | (adjective) of communal life sequestered from the world under religious vows | Synonyms: cloistered, conventual, monastic, monastical |
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| clostridia | (noun) spindle-shaped bacterial cell especially one swollen at the center by an endospore | Synonyms: clostridium |
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| clostridium | (noun) spindle-shaped bacterial cell especially one swollen at the center by an endospore | Synonyms: clostridia |
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| coatrack | (noun) a rack with hooks for temporarily holding coats and hats | Synonyms: coat rack, hatrack |
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| coatroom | (noun) a room where coats and other articles can be left temporarily | Synonyms: cloakroom |
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| cockatrice | (noun) monster hatched by a reptile from a cock's egg; able to kill with a glance | - |
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| colorimetric | (adjective) of or relating to colorimetry | Synonyms: colorimetrical |
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| colorimetrical | (adjective) of or relating to colorimetry | Synonyms: colorimetric |
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| colorimetry | (noun) quantitative chemical analysis by color using a colorimeter | Synonyms: colorimetric analysis |
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| colostrum | (noun) milky fluid secreted for the first day or two after parturition | Synonyms: foremilk |
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| compatriot | (noun) a person from your own country | - |
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| comptroller | (noun) someone who maintains and audits business accounts | Synonyms: accountant, controller |
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| comptrollership | (noun) the position of comptroller | - |
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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 |
| (verb) cook until very little liquid is left | Synonyms: boil down, reduce |
| (verb) make denser, stronger, or purer | - |
| (verb) make central | Synonyms: centralise, centralize |
| (verb) be cooked until very little liquid is left | Synonyms: boil down, decoct, reduce |
| (verb) make more concise | Synonyms: condense, digest |
| (verb) compress or concentrate | Synonyms: condense, contract |
| (verb) direct one's attention on something | Synonyms: center, centre, focus, pore, rivet |
| (verb) draw together or meet in one common center | - |
| concentrated | (adjective) gathered together or made less diffuse | - |
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| (adjective) (of light) transmitted directly from a pointed light source | Synonyms: hard |
| (adjective) being the most concentrated solution possible at a given temperature; unable to dissolve still more of a substance | Synonyms: saturated |
| (adjective) intensely focused | - |
| (adjective) of or relating to a solution whose dilution has been reduced | - |
| 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 | - |
| concentre | (verb) bring into focus or alignment; to converge or cause to converge; of ideas or emotions | Synonyms: concenter, focalise, focalize, focus |
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| concentric | (adjective) having a common center | Synonyms: concentrical, homocentric |
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| concentrical | (adjective) having a common center | Synonyms: concentric, homocentric |
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| concentricity | (noun) the quality of having the same center (as circles inside one another) | - |
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| conductress | (noun) a woman conductor | - |
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| constrain | (verb) severely restrict in scope or extent | Synonyms: stiffen, tighten, tighten up |
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| (verb) to close within bounds, or otherwise limit or deprive of free movement | Synonyms: confine, hold, restrain |
| (verb) compel to behave in a certain way | Synonyms: enforce, impose |
| constrained | (adjective) lacking spontaneity; not natural | Synonyms: forced, strained |
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| constrainedly | (adverb) in a constrained manner | - |
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| constraining | (adjective) restricting the scope or freedom of action | Synonyms: confining, constrictive, limiting, restricting |
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| constraint | (noun) the act of constraining; the threat or use of force to control the thoughts or behavior of others | - |
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| (noun) a device that retards something's motion | Synonyms: restraint |
| (noun) the state of being physically constrained | Synonyms: restraint |
| constrict | (verb) become tight or as if tight | Synonyms: constringe, narrow |
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| (verb) squeeze or press together | Synonyms: compact, compress, contract, press, squeeze |
| constricted | (adjective) drawn together or squeezed physically or by extension psychologically | - |
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| (adjective) especially tense; especially in some dialects | - |
| constricting | (adjective) (of circumstances) tending to constrict freedom | Synonyms: constrictive, narrowing |
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| constriction | (noun) the action or process of compressing | - |
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| (noun) a tight feeling in some part of the body | Synonyms: tightness |
| (noun) tight or narrow compression | Synonyms: coarctation |
| (noun) a narrowing that reduces the flow through a channel | Synonyms: bottleneck, chokepoint |
| constrictive | (adjective) (of circumstances) tending to constrict freedom | Synonyms: constricting, narrowing |
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| (adjective) restricting the scope or freedom of action | Synonyms: confining, constraining, limiting, restricting |
| constrictor | (noun) any of various large nonvenomous snakes that kill their prey by crushing it in its coils | - |
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| constringe | (verb) become tight or as if tight | Synonyms: constrict, narrow |
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| construal | (noun) an interpretation of the meaning of something; the act of construing | - |
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| construct | (noun) an abstract or general idea inferred or derived from specific instances | Synonyms: concept, conception |
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| (verb) reassemble mentally | Synonyms: reconstruct, retrace |
| (verb) draw with suitable instruments and under specified conditions | - |
| (verb) make by combining materials and parts | Synonyms: build, make |
| (verb) put together out of artificial or natural components or parts | Synonyms: fabricate, manufacture |
| (verb) create by organizing and linking ideas, arguments, or concepts | - |
| (verb) create by linking linguistic units | - |
| construction | (noun) the act of constructing something | Synonyms: building |
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| (noun) the commercial activity involved in repairing old structures or constructing new ones | Synonyms: building |
| (noun) drawing a figure satisfying certain conditions as part of solving a problem or proving a theorem | - |
| (noun) a thing constructed; a complex entity constructed of many parts | Synonyms: structure |
| (noun) the creation of a construct; the process of combining ideas into a congruous object of thought | Synonyms: mental synthesis |
| (noun) an interpretation of a text or action | Synonyms: twist |
| (noun) a group of words that form a constituent of a sentence and are considered as a single unit | Synonyms: expression, grammatical construction |
| constructive | (adjective) constructing or tending to construct or improve or promote development | - |
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| (adjective) emphasizing what is laudable or hopeful or to the good | - |
| constructively | (adverb) in a constructive manner | - |
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| constructiveness | (noun) the quality of serving to build or improve | - |
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| constructivism | (noun) an abstractionist artistic movement in Russia after World War I; industrial materials were used to construct nonrepresentational objects | - |
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| constructivist | (noun) an artist of the school of constructivism | - |
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| constructor | (noun) someone who contracts for and supervises construction (as of a building) | Synonyms: builder |
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| construe | (verb) make sense of; assign a meaning to | Synonyms: interpret, see |
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| contraband | (adjective) distributed or sold illicitly | Synonyms: black-market, black, bootleg, smuggled |
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| (noun) goods whose importation or exportation or possession is prohibited by law | - |
| contrabandist | (noun) someone who imports or exports without paying duties | Synonyms: moon-curser, moon curser, runner, smuggler |
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| contrabass | (adjective) pitched an octave below normal bass instrumental or vocal range | Synonyms: double-bass |
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| (noun) largest and lowest member of the violin family | Synonyms: bass fiddle, bass viol, bull fiddle, double bass, string bass |
| contrabassoon | (noun) the bassoon that is the largest instrument in the oboe family | Synonyms: contrafagotto, double bassoon |
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| contraception | (noun) birth control by the use of devices (diaphragm or intrauterine device or condom) or drugs or surgery | Synonyms: contraceptive method |
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| contraceptive | (adjective) capable of preventing conception or impregnation | Synonyms: antifertility, prophylactic |
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| (noun) an agent or device intended to prevent conception | Synonyms: birth control device, contraceptive device, preventative, preventive, prophylactic device |
| contraclockwise | (adjective) in the direction opposite to the rotation of the hands of a clock | Synonyms: anticlockwise, counterclockwise |
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| contract | (noun) a variety of bridge in which the bidder receives points toward game only for the number of tricks he bid | Synonyms: contract bridge |
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| (noun) a binding agreement between two or more persons that is enforceable by law | - |
| (noun) (contract bridge) the highest bid becomes the contract setting the number of tricks that the bidder must make | Synonyms: declaration |
| (verb) be stricken by an illness, fall victim to an illness | Synonyms: get, take |
| (verb) make or become more narrow or restricted | Synonyms: narrow |
| (verb) become smaller or draw together | Synonyms: shrink |
| (verb) reduce in scope while retaining essential elements | Synonyms: abbreviate, abridge, cut, foreshorten, reduce, shorten |
| (verb) compress or concentrate | Synonyms: concentrate, condense |
| (verb) enter into a contractual arrangement | Synonyms: undertake |
| (verb) make smaller | - |
| (verb) squeeze or press together | Synonyms: compact, compress, constrict, press, squeeze |
| (verb) engage by written agreement | Synonyms: sign, sign on, sign up |
| contractable | (adjective) (of disease) capable of being transmitted by infection | Synonyms: catching, communicable, contagious, transmissible, transmittable |
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| contracted | (adjective) reduced in size or pulled together | - |
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| contractile | (adjective) capable of contracting or being contracted | - |
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| contractility | (noun) the capability or quality of shrinking or contracting, especially by muscle fibers and even some other forms of living matter | - |
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| contracting | (noun) becoming infected | Synonyms: catching |
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| contraction | (noun) the act of decreasing (something) in size or volume or quantity or scope | - |
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| (noun) (physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber) | Synonyms: muscle contraction, muscular contraction |
| (noun) a word formed from two or more words by omitting or combining some sounds | - |
| (noun) the process or result of becoming smaller or pressed together | Synonyms: compression, condensation |
| 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 |
| contractual | (adjective) relating to or part of a binding legal agreement | - |
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| contractually | (adverb) by virtue of a contract | - |
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| contracture | (noun) an abnormal and usually permanent contraction of a muscle | - |
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| contradance | (noun) a type of folk dance in which couples are arranged in sets or face one another in a line | Synonyms: contra danse, contredanse, country-dance, country dancing |
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| (verb) perform a contradance | Synonyms: contra danse, contredanse, country-dance |
| contradict | (verb) prove negative; show to be false | Synonyms: negate |
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| (verb) deny the truth of | Synonyms: contravene, negate |
| (verb) be resistant to | Synonyms: controvert, oppose |
| (verb) be in contradiction with | Synonyms: belie, negate |
| contradiction | (noun) the speech act of contradicting someone | - |
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| (noun) (logic) a statement that is necessarily false | Synonyms: contradiction in terms |
| (noun) opposition between two conflicting forces or ideas | - |
| 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 | - |
| contradistinction | (noun) a distinction drawn on the basis of contrast | - |
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| contradistinguish | (verb) distinguish by contrasting qualities | - |
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| contrafagotto | (noun) the bassoon that is the largest instrument in the oboe family | Synonyms: contrabassoon, double bassoon |
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| contrail | (noun) an artificial cloud created by an aircraft; caused either by condensation due to the reduction in air pressure above the wing surface or by water vapor in the engine exhaust | Synonyms: condensation trail |
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| contraindicate | (verb) make a treatment inadvisable | - |
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| contraindication | (noun) (medicine) a reason that makes it inadvisable to prescribe a particular drug or employ a particular procedure or treatment | - |
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| contralateral | (adjective) on or relating to the opposite side (of the body) | - |
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| contralto | (adjective) of or being the lowest female voice | Synonyms: alto |
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| (noun) the lowest female singing voice | Synonyms: alto |
| (noun) a woman singer having a contralto voice | - |
| contraption | (noun) a device or control that is very useful for a particular job | Synonyms: appliance, contrivance, convenience, gadget, gismo, gizmo, widget |
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| contrapuntal | (adjective) having two or more independent but harmonically related melodic parts sounding together | Synonyms: polyphonic |
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| (adjective) relating to or characteristic of or according to the rules of counterpoint | - |
| contrapuntist | (noun) a composer who specializes in counterpoint | - |
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| contrarian | (noun) an investor who deliberately decides to go against the prevailing wisdom of other investors | - |
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| contrariety | (noun) the relation between contraries | - |
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| contrarily | (adverb) contrary to expectations | Synonyms: contrariwise, on the contrary, to the contrary |
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| (adverb) in a contrary disobedient manner | Synonyms: contrariwise, perversely |
| contrariness | (noun) a fussy and eccentric disposition | Synonyms: crankiness, crotchetiness, grumpiness |
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| (noun) deliberate and stubborn unruliness and resistance to guidance or discipline | Synonyms: perverseness, perversity |
| contrarious | (adjective) characterized by self-willed opposition | Synonyms: cross-grained |
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| contrariwise | (adverb) contrary to expectations | Synonyms: contrarily, on the contrary, to the contrary |
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| (adverb) with the order reversed | Synonyms: the other way around, vice versa |
| (adverb) in a contrary disobedient manner | Synonyms: contrarily, perversely |
| contrary | (adjective) of words or propositions so related that both cannot be true but both may be false | - |
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| (adjective) very opposed in nature or character or purpose | - |
| (adjective) resistant to guidance or discipline | Synonyms: obstinate, perverse, wayward |
| (adjective) in an opposing direction | Synonyms: adverse |
| (noun) exact opposition | - |
| (noun) a relation of direct opposition | Synonyms: opposite, reverse |
| (noun) a logical relation such that two propositions are contraries if both cannot be true but both can be false | - |
| contrast | (noun) the act of distinguishing by comparing differences | - |
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| (noun) the range of optical density and tone on a photographic negative or print (or the extent to which adjacent areas on a television screen differ in brightness) | - |
| (noun) the perceptual effect of the juxtaposition of very different colors | - |
| (noun) a conceptual separation or distinction | Synonyms: demarcation, dividing line, line |
| (noun) the opposition or dissimilarity of things that are compared | Synonyms: direct contrast |
| (verb) put in opposition to show or emphasize differences | - |
| (verb) to show differences when compared; be different | Synonyms: counterpoint |
| contrasting | (adjective) strikingly different; tending to contrast | Synonyms: contrastive |
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| contrastingly | (adverb) in a contrasting manner | - |
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| contrastive | (adjective) of words so related that one contrasts with the other | Synonyms: incompatible |
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| (adjective) strikingly different; tending to contrast | Synonyms: contrasting |
| (adjective) syntactically establishing a relation of contrast between sentences or elements of a sentence | - |
| contrasty | (adjective) having sharp differences between black and white | - |
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| contravallation | (noun) a fortification build around a sieged target by the besiegers to prevent attacks by the defenders. | - |
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| contravene | (verb) deny the truth of | Synonyms: contradict, negate |
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| (verb) go against, as of rules and laws | Synonyms: conflict, infringe, run afoul |
| contravention | (noun) coming into conflict with | Synonyms: dispute |
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| contredanse | (noun) a type of folk dance in which couples are arranged in sets or face one another in a line | Synonyms: contra danse, contradance, country-dance, country dancing |
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| (verb) perform a contradance | Synonyms: contra danse, contradance, country-dance |
| contretemps | (noun) an awkward clash | - |
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| contribute | (verb) contribute to some cause | Synonyms: chip in, give, kick in |
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| (verb) bestow a quality on | Synonyms: add, bestow, bring, impart, lend |
| (verb) provide | Synonyms: put up |
| (verb) be conducive to | Synonyms: conduce, lead |
| contributing | (adjective) tending to bring about; being partly responsible for | Synonyms: conducive, contributive, contributory, tributary |
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