| concept | (noun) an abstract or general idea inferred or derived from specific instances | Synonyms: conception, construct |
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| concert | (noun) a performance of music by players or singers not involving theatrical staging | - |
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| concertinist | (noun) a person who plays the concertina | - |
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| conchologist | (noun) a collector and student of mollusc shells | - |
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| concomitant | (noun) an event or situation that happens at the same time as or in connection with another | Synonyms: accompaniment, attendant, co-occurrence |
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| concordat | (noun) a signed written agreement between two or more parties (nations) to perform some action | Synonyms: compact, covenant |
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| condiment | (noun) a preparation (a sauce or relish or spice) to enhance flavor or enjoyment | - |
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| conduct | (noun) manner of acting or controlling yourself | Synonyms: behavior, behaviour, doings |
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| (noun) (behavioral attributes) the way a person behaves toward other people | Synonyms: behavior, behaviour, demeanor, demeanour, deportment |
| conduit | (noun) a passage (a pipe or tunnel) through which water or electric wires can pass | - |
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| confect | (noun) a rich sweet made of flavored sugar and often combined with fruit or nuts | Synonyms: candy |
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| conferment | (noun) the act of conferring an honor or presenting a gift | Synonyms: bestowal, bestowment, conferral |
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| confidant | (noun) someone to whom private matters are confided | Synonyms: intimate |
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| confinement | (noun) the act of restraining of a person's liberty by confining them | - |
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| (noun) the act of keeping something within specified bounds (by force if necessary) | Synonyms: restriction |
| (noun) the state of being confined | - |
| (noun) concluding state of pregnancy; from the onset of contractions to the birth of a child | Synonyms: childbed, labor, labour, lying-in, parturiency, travail |
| confit | (noun) a piece of meat (especially a duck) cooked slowly in its own fat | - |
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| conflict | (noun) an open clash between two opposing groups (or individuals) | Synonyms: battle, struggle |
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| (noun) a hostile meeting of opposing military forces in the course of a war | Synonyms: battle, engagement, fight |
| (noun) an incompatibility of dates or events | - |
| (noun) a disagreement or argument about something important | Synonyms: difference, difference of opinion, dispute |
| (noun) opposition between two simultaneous but incompatible feelings | - |
| (noun) opposition in a work of drama or fiction between characters or forces (especially an opposition that motivates the development of the plot) | - |
| (noun) a state of opposition between persons or ideas or interests | - |
| confluent | (noun) a branch that flows into the main stream | Synonyms: affluent, feeder, tributary |
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| conformist | (noun) someone who conforms to established standards of conduct (especially in religious matters) | - |
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| congealment | (noun) the process of congealing; solidification by (or as if by) freezing | Synonyms: congelation |
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| congregant | (noun) a member of a congregation (especially that of a church or synagogue) | - |
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| conodont | (noun) small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes | - |
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| (noun) the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta | - |
| conquest | (noun) success in mastering something difficult | - |
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| (noun) the act of conquering | Synonyms: conquering, subjection, subjugation |
| (noun) an act of winning the love or sexual favor of someone | Synonyms: seduction |
| conscript | (noun) someone who is drafted into military service | Synonyms: draftee, inductee |
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| consent | (noun) permission for something to happen | - |
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| conservationist | (noun) someone who works to protect the environment from destruction or pollution | Synonyms: environmentalist |
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| conservativist | (noun) a person who is reluctant to accept changes and new ideas | Synonyms: conservative |
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| consignment | (noun) the official act of consigning a person to confinement (as in a prison or mental hospital) | Synonyms: commitment, committal |
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| (noun) the delivery of goods for sale or disposal | - |
| (noun) goods carried by a large vehicle | Synonyms: cargo, freight, lading, load, loading, payload, shipment |
| consonant | (noun) a speech sound that is not a vowel | - |
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| (noun) a letter of the alphabet standing for a spoken consonant | - |
| consort | (noun) a family of similar musical instrument playing together | Synonyms: choir |
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| (noun) the husband or wife of a reigning monarch | - |
| constant | (noun) a quantity that does not vary | Synonyms: constant quantity, invariable |
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| (noun) a number representing a quantity assumed to have a fixed value in a specified mathematical context | - |
| constituent | (noun) an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system | Synonyms: component, element |
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| (noun) an abstract part of something | Synonyms: component, element, factor, ingredient |
| (noun) (grammar) a word or phrase or clause forming part of a larger grammatical construction | Synonyms: grammatical constituent |
| (noun) a member of a constituency; a citizen who is represented in a government by officials for whom he or she votes | - |
| (noun) something determined in relation to something that includes it | Synonyms: component, component part, part, portion |
| constitutionalist | (noun) an advocate of constitutional government | - |
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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 |
| construct | (noun) an abstract or general idea inferred or derived from specific instances | Synonyms: concept, conception |
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| constructivist | (noun) an artist of the school of constructivism | - |
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| consultant | (noun) an expert who gives advice | Synonyms: adviser, advisor |
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| contact | (noun) the act of touching physically | Synonyms: physical contact |
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| (noun) close interaction | - |
| (noun) (electronics) a junction where things (as two electrical conductors) touch or are in physical contact | Synonyms: tangency |
| (noun) a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication | Synonyms: contact lens |
| (noun) a channel for communication between groups | Synonyms: inter-group communication, liaison, link |
| (noun) a communicative interaction | Synonyms: touch |
| (noun) the physical coming together of two or more things | Synonyms: impinging, striking |
| (noun) a person who is in a position to give you special assistance | Synonyms: middleman |
| (noun) the state or condition of touching or of being in immediate proximity | - |
| containment | (noun) the act of containing; keeping something from spreading | - |
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| (noun) (physics) a system designed to prevent the accidental release of radioactive material from a reactor | - |
| (noun) a policy of creating strategic alliances in order to check the expansion of a hostile power or ideology or to force it to negotiate peacefully | - |
| contaminant | (noun) a substance that contaminates | Synonyms: contamination |
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| contempt | (noun) a willful disobedience to or disrespect for the authority of a court or legislative body | - |
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| (noun) a manner that is generally disrespectful and contemptuous | Synonyms: disrespect |
| (noun) open disrespect for a person or thing | Synonyms: scorn |
| (noun) lack of respect accompanied by a feeling of intense dislike | Synonyms: despite, disdain, scorn |
| content | (noun) something (a person or object or scene) selected by an artist or photographer for graphic representation | Synonyms: depicted object, subject |
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| (noun) the sum or range of what has been perceived, discovered, or learned | Synonyms: cognitive content, mental object |
| (noun) content communicating a message; what something is about | Synonyms: message, subject matter, substance |
| (noun) (usually plural) everything that is included in a collection and that is held or included in something | Synonyms: contents |
| (noun) the amount that can be contained | Synonyms: capacity |
| (noun) the proportion of a substance that is contained in a mixture or alloy etc. | - |
| (noun) the state of being contented with your situation in life | Synonyms: contentedness |
| contentment | (noun) happiness with one's situation in life | - |
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| contest | (noun) a struggle between rivals | - |
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| (noun) an occasion on which a winner is selected from among two or more contestants | Synonyms: competition |
| contestant | (noun) a person who participates in competitions | - |
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| (noun) a person who dissents from some established policy | Synonyms: dissenter, dissident, objector, protester |
| context | (noun) discourse that surrounds a language unit and helps to determine its interpretation | Synonyms: context of use, linguistic context |
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| (noun) the set of facts or circumstances that surround a situation or event | Synonyms: circumstance, setting |
| continent | (noun) one of the large landmasses of the earth | - |
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| contingent | (noun) a temporary military unit | Synonyms: detail |
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| (noun) a gathering of persons representative of some larger group | - |
| continuant | (noun) consonant articulated by constricting (but not closing) the vocal tract | Synonyms: continuant consonant |
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| contortionist | (noun) an acrobat able to twist into unusual positions | - |
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| contrabandist | (noun) someone who imports or exports without paying duties | Synonyms: moon-curser, moon curser, runner, smuggler |
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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 |
| contrapuntist | (noun) a composer who specializes in counterpoint | - |
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| 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 |
| controversialist | (noun) a person who disputes; who is good at or enjoys controversy | Synonyms: disputant, eristic |
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| convalescent | (noun) a person who is recovering from illness | - |
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| convent | (noun) a religious residence especially for nuns | - |
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| (noun) a community of people in a religious order (especially nuns) living together | - |
| conversationalist | (noun) someone skilled at conversation | Synonyms: conversationist, schmoozer |
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| conversationist | (noun) someone skilled at conversation | Synonyms: conversationalist, schmoozer |
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| convert | (noun) a person who has been converted to another religious or political belief | - |
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| convict | (noun) a person serving a sentence in a jail or prison | Synonyms: con, inmate, yard bird, yardbird |
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| (noun) a person who has been convicted of a criminal offense | - |
| cookout | (noun) an informal meal cooked and eaten outdoors | - |
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| coolant | (noun) a fluid agent (gas or liquid) that produces cooling; especially one used to cool a system by transferring heat away from one part to another | - |
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| coolwart | (noun) stoloniferous white-flowered spring-blooming woodland plant | Synonyms: false miterwort, false mitrewort, foamflower, Tiarella cordifolia |
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| coot | (noun) slate-black slow-flying birds somewhat resembling ducks | - |
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| copilot | (noun) a relief pilot on an airplane | Synonyms: co-pilot |
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| copout | (noun) a failure to face some difficulty squarely | - |
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| copycat | (noun) someone who copies the words or behavior of another | Synonyms: ape, aper, emulator, imitator |
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| copyist | (noun) someone employed to make written copies of documents and manuscripts | Synonyms: scribe, scrivener |
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| copyright | (noun) a document granting exclusive right to publish and sell literary or musical or artistic work | Synonyms: right of first publication |
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| coquet | (noun) a seductive man who uses his sex appeal to exploit women | - |
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| coralroot | (noun) European bittercress having a knotted white rootstock | Synonyms: Cardamine bulbifera, coral-root bittercress, coralwort, Dentaria bulbifera |
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| coralwort | (noun) European bittercress having a knotted white rootstock | Synonyms: Cardamine bulbifera, coral-root bittercress, coralroot, Dentaria bulbifera |
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| coreligionist | (noun) someone having the same religion as another person | - |
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| corespondent | (noun) the codefendant charged with adultery with the estranged spouse in a divorce proceeding | Synonyms: co-respondent |
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| cormorant | (noun) large voracious dark-colored long-necked seabird with a distensible pouch for holding fish; used in Asia to catch fish | Synonyms: Phalacrocorax carbo |
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| cornet | (noun) a brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves | Synonyms: horn, trump, trumpet |
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| cornetist | (noun) a musician who plays the trumpet or cornet | Synonyms: trumpeter |
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| cornsmut | (noun) a smut fungus attacking Indian corn | Synonyms: corn smut |
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| coronet | (noun) margin between the skin of the pastern and the horn of the hoof | - |
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| (noun) a small crown; usually indicates a high rank but below that of sovereign | - |
| corporatist | (noun) a supporter of corporatism | - |
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| corposant | (noun) an electrical discharge accompanied by ionization of surrounding atmosphere | Synonyms: corona, corona discharge, electric glow, Saint Elmo's fire, Saint Elmo's light, Saint Ulmo's fire, Saint Ulmo's light, St. Elmo's fire |
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| correspondent | (noun) someone who communicates by means of letters | Synonyms: letter writer |
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| (noun) a journalist employed to provide news stories for newspapers or broadcast media | Synonyms: newswriter |
| corselet | (noun) a piece of body armor for the trunk; usually consists of a breastplate and back piece | Synonyms: corslet |
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| corset | (noun) a woman's close-fitting foundation garment | Synonyms: girdle, stays |
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| corslet | (noun) a piece of body armor for the trunk; usually consists of a breastplate and back piece | Synonyms: corselet |
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| cosecant | (noun) ratio of the hypotenuse to the opposite side of a right-angled triangle | Synonyms: cosec |
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| cosmetologist | (noun) an expert in the use of cosmetics | - |
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| cosmographist | (noun) a scientist knowledgeable about cosmography | Synonyms: cosmographer |
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| cosmologist | (noun) an astronomer who studies the evolution and space-time relations of the universe | - |
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| cosmonaut | (noun) a person trained to travel in a spacecraft | Synonyms: astronaut, spaceman |
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| cost | (noun) the property of having material worth (often indicated by the amount of money something would bring if sold) | Synonyms: monetary value, price |
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| (noun) value measured by what must be given or done or undergone to obtain something | Synonyms: price, toll |
| (noun) the total spent for goods or services including money and time and labor | - |
| costusroot | (noun) annual herb of the eastern Himalayas (Kashmir) having purple florets and a fragrant root that yields a volatile oil used in perfumery and for preserving furs | Synonyms: Saussurea costus, Saussurea lappa |
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| cot | (noun) a small bed that folds up for storage or transport | Synonyms: camp bed |
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| (noun) baby bed with high sides made of slats | Synonyms: crib |
| (noun) a sheath worn to protect a finger | Synonyms: fingerstall |
| cotangent | (noun) ratio of the adjacent to the opposite side of a right-angled triangle | Synonyms: cotan |
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| cotenant | (noun) one of two or more tenants holding title to the same property | - |
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| count | (noun) the act of counting; reciting numbers in ascending order | Synonyms: counting, enumeration, numeration, reckoning, tally |
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| (noun) a nobleman (in various countries) having rank equal to a British earl | - |
| (noun) the total number counted | - |
| counterargument | (noun) an argument offered in opposition to another argument | - |
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| counterblast | (noun) a vigorous and unrestrained response | - |
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| counterbombardment | (noun) bombardment intended to destroy or neutralize enemy weapons | - |
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| countercurrent | (noun) actions counter to the main group activity | Synonyms: crosscurrent |
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| (noun) a stretch of turbulent water in a river or the sea caused by one current flowing into or across another current | Synonyms: crosscurrent, rip, riptide, tide rip |
| counterfeit | (noun) a copy that is represented as the original | Synonyms: forgery |
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