10-letter words starting with CO
Embark on a linguistic journey with words that begin with the letter CO. This section showcases how CO at the start shapes the identity and sound of various words. From commonly used terms to rare finds, explore the diverse range of words that start with CO, enriching your vocabulary and appreciation for language.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| completely | 19 | to a complete degree or to the full or entire extent (`whole' is often used informally for `wholly') | it was completely different from what we expected |
| connection | 14 | the process of bringing ideas or events together in memory or imagination | - |
| considered | 14 | carefully weighed | a considered opinion |
| confidence | 18 | a trustful relationship | he took me into his confidence |
| conference | 17 | an association of sports teams that organizes matches for its members | - |
| conditions | 13 | the atmospheric conditions that comprise the state of the atmosphere in terms of temperature and wind and clouds and precipitation | every day we have weather conditions and yesterday was no exception |
| collection | 14 | request for a sum of money | - |
| conscience | 16 | motivation deriving logically from ethical or moral principles that govern a person's thoughts and actions | - |
| commercial | 18 | a commercially sponsored ad on radio or television | - |
| commission | 16 | a group of representatives or delegates | - |
| confession | 15 | an admission of misdeeds or faults | - |
| constantly | 15 | without interruption | the world is constantly changing |
| controlled | 13 | restrained or managed or kept within certain bounds | controlled emotions |
| commitment | 18 | a message that makes a pledge | - |
| conspiracy | 19 | a secret agreement between two or more people to perform an unlawful act | - |
| conclusion | 14 | event whose occurrence ends something | - |
| convenient | 15 | large and roomy (`convenient' is archaic in this sense) | - |
| convention | 15 | orthodoxy as a consequence of being conventional | - |
| compliment | 18 | say something to someone that expresses praise | He complimented her on her last physics paper |
| collecting | 15 | the act of gathering something together | - |
| compromise | 18 | a middle way between two extremes | - |
| compassion | 16 | a deep awareness of and sympathy for another's suffering | - |
| convincing | 18 | causing one to believe the truth of something | a convincing story |
| corruption | 14 | in a state of progressive putrefaction | - |
| concerning | 15 | - | - |
| conviction | 17 | (criminal law) a final judgment of guilty in a criminal case and the punishment that is imposed | the conviction came as no surprise |
| consistent | 12 | the same throughout in structure or composition | bituminous coal is often treated as a consistent and homogeneous product |
| collective | 17 | done by or characteristic of individuals acting together | the collective mind |
| continuing | 13 | of long duration | - |
| committing | 17 | - | - |
| contribute | 14 | provide | - |
| cocksucker | 24 | insulting terms of address for people who are stupid or irritating or ridiculous | - |
| consultant | 12 | an expert who gives advice | - |
| courageous | 13 | possessing or displaying courage; able to face and deal with danger or fear without flinching | a frank courageous heart...triumphed over pain |
| contractor | 14 | the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps | - |
| comparison | 16 | qualities that are comparable | no comparison between the two books |
| contagious | 13 | (of disease) capable of being transmitted by infection | - |
| commanding | 18 | used of a height or viewpoint | a commanding view of the ocean |
| compensate | 16 | make payment to; compensate | - |
| comforting | 18 | providing freedom from worry | - |
| concussion | 14 | any violent blow | - |
| counseling | 13 | something that provides direction or advice as to a decision or course of action | - |
| collateral | 12 | occurring with or following as a consequence | collateral target damage from a bombing run |
| continuous | 12 | continuing in time or space without interruption | a continuous rearrangement of electrons in the solar atoms results in the emission of light |
| courthouse | 15 | a building that houses judicial courts | - |
| conducting | 16 | the direction of an orchestra or choir | he does not use a baton for conducting |
| contestant | 12 | a person who dissents from some established policy | - |
| comprehend | 20 | include in scope; include as part of something broader; have as one's sphere or territory | - |
| compatible | 18 | able to exist and perform in harmonious or agreeable combination | a compatible married couple |
| consulting | 13 | - | - |
| conception | 16 | the event that occurred at the beginning of something | - |
| correction | 14 | the act of disciplining | - |
| completion | 16 | (American football) a successful forward pass in football | - |
| counsellor | 12 | a lawyer who pleads cases in court | - |
| complicate | 18 | make more complex, intricate, or richer | - |
| collapsing | 15 | - | - |
| compulsive | 19 | strongly motivated to succeed | - |
| coordinate | 13 | a number that identifies a position relative to an axis | - |
| contracted | 15 | reduced in size or pulled together | the contracted pupils of her eyes |
| compelling | 17 | driving or forcing | compelling ambition |
| coronation | 12 | the ceremony of installing a new monarch | - |
| competitor | 16 | the contestant you hope to defeat | - |
| complexion | 23 | the coloring of a person's face | - |
| confirming | 18 | indicating existence or presence of a suspected condition or pathogen | - |
| contradict | 15 | deny the truth of | - |
| commentary | 19 | a written explanation or criticism or illustration that is added to a book or other textual material | - |
| continuity | 15 | the property of a continuous and connected period of time | - |
| controller | 12 | someone who maintains and audits business accounts | - |
| confiscate | 17 | take temporary possession of as a security, by legal authority | The police confiscated the stolen artwork |
| compulsory | 19 | required by rule | in most schools physical education is compulsory |
| completing | 17 | acting as or providing a complement (something that completes the whole) | - |
| conversion | 15 | a spiritual enlightenment causing a person to lead a new life | - |
| conquering | 22 | the act of conquering | - |
| complexity | 26 | the quality of being intricate and compounded | he enjoyed the complexity of modern computers |
| councilman | 16 | a man who is a council member | - |
| councillor | 14 | a member of a council | - |
| correspond | 15 | be equivalent or parallel, in mathematics | - |
| commandant | 17 | an officer in command of a military unit | - |
| concession | 14 | the act of conceding or yielding | - |
| contraband | 15 | distributed or sold illicitly | - |
| commencing | 19 | - | - |
| compressed | 17 | pressed tightly together | with lips compressed |
| conspiring | 15 | - | - |
| constitute | 12 | form or compose | These constitute my entire belonging |
| conclusive | 17 | forming an end or termination; especially putting an end to doubt or question | conclusive proof |
| consummate | 16 | without qualification; used informally as (often pejorative) intensifiers | a consummate fool |
| combustion | 16 | a process in which a substance reacts with oxygen to give heat and light | - |
| conjecture | 21 | to believe especially on uncertain or tentative grounds | - |
| corrupting | 15 | that infects or taints | - |
| concealing | 15 | the activity of keeping something secret | - |
| collarbone | 14 | bone linking the scapula and sternum | - |
| contingent | 13 | being determined by conditions or circumstances that follow | arms sales contingent on the approval of congress |
| condemning | 16 | containing or imposing condemnation or censure | - |
| comparable | 18 | conforming in every respect | - |
| complicity | 21 | guilt as an accomplice in a crime or offense | - |
| compliance | 18 | a disposition or tendency to yield to the will of others | - |
| competence | 18 | the quality of being adequately or well qualified physically and intellectually | - |
| consensual | 12 | existing by consent | a consensual contract |
| contention | 12 | a contentious speech act; a dispute where there is strong disagreement | - |
| complement | 18 | something added to complete or embellish or make perfect | a fine wine is a perfect complement to the dinner |
| cooperated | 15 | - | - |
| compulsion | 16 | an urge to do or say something that might be better left undone or unsaid | he felt a compulsion to babble on about the accident |
| condolence | 15 | an expression of sympathy with another's grief | they sent their condolences |
| conversing | 16 | - | - |
| cornflakes | 19 | - | - |
| congestion | 13 | excessive crowding | traffic congestion |
| congenital | 13 | present at birth but not necessarily hereditary; acquired during fetal development | - |
| coincident | 15 | occurring or operating at the same time | a series of coincident events |
| complacent | 18 | contented to a fault with oneself or one's actions | he had become complacent after years of success |
| conceptual | 16 | being or characterized by concepts or their formation | conceptual discussions |
| consortium | 14 | an association of companies for some definite purpose | - |
| consenting | 13 | having given consent | consenting adults |
| compressor | 16 | a mechanical device that compresses gasses | - |
| countryman | 17 | a man who lives in the country and has country ways | - |
| concoction | 16 | the act of creating something (a medicine or drink or soup etc.) by compounding or mixing a variety of components | - |
| commandeer | 17 | take arbitrarily or by force | The Cubans commandeered the plane and flew it to Miami |
| commissary | 19 | a retail store that sells equipment and provisions (usually to military personnel) | - |
| conformist | 17 | adhering to established customs or doctrines (especially in religion) | - |
| collegiate | 13 | of or resembling or typical of a college or college students | collegiate living |
| congregate | 14 | come together, usually for a purpose | The crowds congregated in front of the Vatican on Christmas Eve |
| conformity | 20 | orthodoxy in thoughts and belief | - |
| confounded | 17 | perplexed by many conflicting situations or statements; filled with bewilderment | a cloudy and confounded philosopher |
| conduction | 15 | the transmission of heat or electricity or sound | - |
| contrition | 12 | sorrow for sin arising from fear of damnation | - |
| compatriot | 16 | a person from your own country | - |
| confection | 17 | the act of creating something (a medicine or drink or soup etc.) by compounding or mixing a variety of components | - |
| copulation | 14 | sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur | - |
| counteract | 14 | oppose or check by a counteraction | - |
| converging | 17 | the act of converging (coming closer) | - |
| consecrate | 14 | give entirely to a specific person, activity, or cause | consecrate your life to the church |
| condensate | 13 | atmospheric moisture that has condensed because of cold | - |
| concluding | 16 | occurring at or forming an end or termination | his concluding words came as a surprise |
| conceiving | 18 | - | - |
| constraint | 12 | the state of being physically constrained | - |
| confidante | 16 | a female confidant | - |
| corrective | 17 | a device for treating injury or disease | - |
| contiguous | 13 | having a common boundary or edge; abutting; touching | Utah and the contiguous state of Idaho |
| colourless | 12 | weak in color; not colorful | - |
| conversely | 18 | with the terms of the relation reversed | conversely, not all women are mothers |
| convulsion | 15 | a sudden uncontrollable attack | convulsions of laughter |
| coastguard | 14 | a military service responsible for the safety of maritime traffic in coastal waters | - |
| condescend | 16 | do something that one considers to be below one's dignity | - |
| coquettish | 24 | like a coquette | - |
| copywriter | 20 | a person employed to write advertising or publicity copy | - |
| connective | 17 | an instrumentality that connects | - |
| cockamamie | 22 | informal term for ridiculous and implausible | he gave me a cockamamie reason for not going |
| corrugated | 14 | shaped into alternating parallel grooves and ridges | the surface of the ocean was rippled and corrugated |
| compounded | 18 | combined into or constituting a chemical compound | - |
| convulsing | 16 | - | - |
| conforming | 18 | adhering to established customs or doctrines (especially in religion) | - |
| conferring | 16 | - | - |
| conductive | 18 | having the quality or power of conducting heat or electricity or sound; exhibiting conductivity | - |
| colloquial | 21 | characteristic of informal spoken language or conversation | wrote her letters in a colloquial style |
| coloration | 12 | the timbre of a musical sound | - |
| convection | 17 | (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere | - |
| communique | 25 | an official report (usually sent in haste) | - |
| convoluted | 16 | highly complex or intricate and occasionally devious | convoluted legal language |
| coursework | 19 | work assigned to and done by a student during a course of study; usually it is evaluated as part of the student's grade in the course | - |
| cornflower | 18 | an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers | - |
| competency | 21 | the quality of being adequately or well qualified physically and intellectually | - |
| compounder | 17 | - | - |
| cornucopia | 16 | a goat's horn filled with grain and flowers and fruit symbolizing prosperity | - |
| confluence | 17 | a coming together of people | - |
| concertina | 14 | coiled barbed wire used as an obstacle | - |
| compendium | 19 | a publication containing a variety of works | - |
| consequent | 21 | occurring with or following as a consequence | the period of tension and consequent need for military preparedness |
| concretely | 17 | in concrete terms | concretely, this meant that he was broke |
| conveyance | 20 | the act of moving something from one location to another | - |
| coagulated | 14 | changed into a solid mass | - |
| condensing | 14 | the act of increasing the density of something | - |
| cottonwood | 16 | American basswood of the Allegheny region | - |
| coexisting | 20 | existing at the same time | - |
| correlated | 13 | mutually related | - |
| comedienne | 15 | a female actor in a comedy | - |
| convulsive | 18 | affected by involuntary jerky muscular contractions; resembling a spasm | convulsive motions |
| configured | 17 | organized so as to give configuration to | a magnet is surrounded by a configured field |
| codswallop | 18 | nonsensical talk or writing | - |
| cognizance | 24 | having knowledge of | - |
| cordillera | 13 | - | - |
| copulating | 15 | - | - |
| connivance | 17 | (law) tacit approval of someone's wrongdoing | - |
| coarseness | 12 | the quality of being composed of relatively large particles | - |
| counselled | 13 | - | - |
| concurrent | 14 | occurring or operating at the same time | - |
| concentric | 16 | having a common center | concentric rings |
| comprising | 17 | - | - |
| cornstarch | 17 | starch prepared from the grains of corn; used in cooking as a thickener | - |
| convalesce | 17 | get over an illness or shock | - |
| coinciding | 16 | occurring or operating at the same time | - |
| continence | 14 | the exercise of self constraint in sexual matters | - |
| contrabass | 14 | largest and lowest member of the violin family | - |
| cornerback | 20 | a defensive football player stationed outside the linebackers | - |
| complainer | 16 | a person given to excessive complaints and crying and whining | - |
| copulatory | 17 | of or relating to coitus or copulation | - |
| combatting | 17 | - | - |
| copperhead | 20 | common coppery brown pit viper of upland eastern United States | - |
| congestive | 16 | relating to or affected by an abnormal collection of blood or other fluid | congestive heart disease |
| conformism | 19 | orthodoxy in thoughts and belief | - |
| coelacanth | 17 | fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa | - |
| corruptive | 17 | tending to corrupt or pervert | - |
| coherently | 18 | in a coherent manner | she could not talk coherently after the accident |
| corregidor | 14 | the peninsula and island in the Philippines where Japanese forces besieged American forces in World War II; United States forces surrendered in 1942 and recaptured the area in 1945 | - |
| coronaries | 12 | - | - |
| contrarily | 15 | contrary to expectations | - |
| contravene | 15 | deny the truth of | - |
| colorfully | 18 | - | - |
| conversant | 15 | (usually followed by `with') well informed about or knowing thoroughly | conversant with business trends |
| coprophagy | 23 | eating feces; in human a symptom of some kinds of insanity | - |
| comminuted | 17 | - | - |
| cottontail | 12 | common small rabbit of North America having greyish or brownish fur and a tail with a white underside; a host for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks) | - |
| concurring | 15 | being of the same opinion | - |
| costarring | 13 | - | - |
| conciliate | 14 | come to terms | - |
| contextual | 19 | relating to or determined by or in context | contextual information |
| corporator | 14 | - | - |
| compositor | 16 | one who sets written material into type | - |
| colloquium | 23 | an academic meeting or seminar usually led by a different lecturer and on a different topic at each meeting | - |
| conjugated | 21 | formed by the union of two compounds | a conjugated protein |
| cowpuncher | 22 | a hired hand who tends cattle and performs other duties on horseback | - |
| coniferous | 15 | of or relating to or part of trees or shrubs bearing cones and evergreen leaves | - |
| congruence | 15 | the quality of agreeing; being suitable and appropriate | - |
| congregant | 14 | a member of a congregation (especially that of a church or synagogue) | - |
| conflation | 15 | - | - |
| countertop | 14 | the top side of a counter | - |
| conferment | 17 | the act of conferring an honor or presenting a gift | - |
| concussive | 17 | - | - |
| concretion | 14 | a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body | - |
| coercively | 20 | - | - |
| cogitation | 13 | attentive consideration and meditation | after much cogitation he rejected the offer |
| corpulence | 16 | the property of excessive fatness | - |
| contortion | 12 | a tortuous and twisted shape or position | the acrobat performed incredible contortions |
| colonising | 13 | - | - |
| contriving | 16 | - | - |
| cordiality | 16 | a cordial disposition | - |
| convective | 20 | - | - |
| comparator | 16 | - | - |
| convergent | 16 | tending to come together from different directions | - |
| commutator | 16 | switch for reversing the direction of an electric current | - |
| commentate | 16 | make a commentary on | - |
| copresents | 14 | - | - |
| conjugates | 20 | - | - |
| conjugator | 20 | - | - |
| conjunctly | 24 | - | - |
| conjurator | 19 | - | - |
| conjurings | 20 | - | - |
| conlangers | 13 | - | - |
| connascent | 14 | - | - |
| connations | 12 | - | - |
| connatural | 12 | normally existing at birth | mankind's connatural sense of the good |
| connatures | 12 | - | - |
| connecters | 14 | - | - |
| connecting | 15 | - | - |
| connectors | 14 | - | - |
| connexions | 19 | - | - |
| conniption | 14 | a display of bad temper | - |
| connivancy | 20 | - | - |
| connivence | 17 | - | - |
| connivency | 20 | - | - |
| connivings | 16 | - | - |
| connotated | 13 | - | - |
| connotates | 12 | - | - |
| conoidally | 16 | - | - |
| conoidical | 15 | - | - |
| conominees | 14 | - | - |
| conoscente | 14 | - | - |
| conoscenti | 14 | - | - |
| conquerers | 21 | - | - |
| conqueress | 21 | - | - |
| conquerors | 21 | - | - |
| conscribed | 17 | - | - |
| conscribes | 16 | - | - |
| conscripts | 16 | - | - |
| consectary | 17 | - | - |
| consension | 12 | - | - |
| consenters | 12 | - | - |
| conservant | 15 | - | - |
| conservers | 15 | - | - |
| conserving | 16 | - | - |
| considerer | 13 | - | - |
| consignees | 13 | - | - |
| consigners | 13 | - | - |
| consignify | 19 | - | - |
| consigning | 14 | - | - |
| consignors | 13 | - | - |
| consilient | 12 | - | - |
| consimilar | 14 | - | - |
| consisting | 13 | - | - |
| consistory | 15 | a church tribunal or governing body | - |
| consociate | 14 | bring or come into association or action | The churches consociated to fight their dissolution |
| consolable | 14 | able to be consoled | - |
| consolated | 13 | - | - |
| consolates | 12 | - | - |
| consonance | 14 | the repetition of consonants (or consonant patterns) especially at the ends of words | - |
| consonancy | 17 | - | - |
| consonants | 12 | - | - |
| consorters | 12 | - | - |
| consortial | 12 | - | - |
| consorting | 13 | - | - |
| consortism | 14 | - | - |
| conspectus | 16 | an overall summary | - |
| conspirant | 14 | - | - |
| conspirers | 14 | - | - |
| constables | 14 | - | - |
| constantan | 12 | an alloy of copper and nickel with high electrical resistance and a low temperature coefficient; used as resistance wire | - |
| constating | 13 | - | - |
| constative | 15 | - | - |
| constering | 13 | - | - |
| constipate | 14 | impede with a clog or as if with a clog | My mind is constipated today |
| constrains | 12 | - | - |
| constricts | 14 | - | - |
| constringe | 13 | become tight or as if tight | - |
| construals | 12 | - | - |
| constructs | 14 | - | - |
| construers | 12 | - | - |
| construing | 13 | - | - |
| consubsist | 14 | - | - |
| consuetude | 13 | a custom or usage that has acquired the force of law | - |
| consulages | 13 | - | - |
| consulates | 12 | - | - |
| consulship | 17 | the post of consul | - |
| consultees | 12 | - | - |
| consulters | 12 | - | - |
| consultive | 15 | giving advice | - |
| consultors | 12 | - | - |
| consultory | 15 | - | - |
| consumable | 16 | may be used up | - |
| consumedly | 18 | - | - |
| consumings | 15 | - | - |
| contactees | 14 | - | - |
| contacting | 15 | - | - |
| contactors | 14 | - | - |
| contactual | 14 | - | - |
| contadinas | 13 | - | - |
| contadinos | 13 | - | - |
| contagions | 13 | - | - |
| containers | 12 | - | - |
| containing | 13 | - | - |
| contangoed | 14 | - | - |
| contangoes | 13 | - | - |
| contemners | 14 | - | - |
| contemning | 15 | - | - |
| contemnors | 14 | - | - |
| contempers | 16 | - | - |
| contendent | 13 | - | - |
| contenders | 13 | - | - |
| contending | 14 | - | - |
| contenting | 13 | - | - |
| contesters | 12 | - | - |
| contesting | 13 | - | - |
| contexture | 19 | - | - |
| contiguity | 16 | the attribute of being so near as to be touching | - |
| continency | 17 | the exercise of self constraint in sexual matters | - |
| continents | 12 | - | - |
| continuant | 12 | consonant articulated by constricting (but not closing) the vocal tract | - |
| continuate | 12 | - | - |
| continuers | 12 | - | - |
| continuums | 14 | - | - |
| contorting | 13 | - | - |
| contortive | 15 | - | - |
| contouring | 13 | - | - |
| contraflow | 18 | - | - |
| contrahent | 15 | - | - |
| contraltos | 12 | - | - |
| contraplex | 21 | - | - |
| contraprop | 16 | - | - |
| contrarian | 12 | an investor who deliberately decides to go against the prevailing wisdom of other investors | - |
| contraried | 13 | - | - |
| contraries | 12 | - | - |
| contrasted | 13 | - | - |
| contrecoup | 16 | - | - |
| contristed | 13 | - | - |
| contritely | 15 | in a rueful manner | - |
| contrivers | 15 | - | - |
| controuled | 13 | - | - |
| controvert | 15 | be resistant to | - |
| contunding | 14 | - | - |
| contusions | 12 | - | - |
| conundrums | 15 | - | - |
| convecting | 18 | - | - |
| convectors | 17 | - | - |
| convenable | 17 | - | - |
| convenance | 17 | - | - |
| convenings | 16 | - | - |
| conventing | 16 | - | - |
| conventual | 15 | of communal life sequestered from the world under religious vows | - |
| conversate | 15 | - | - |
| conversers | 15 | - | - |
| convertend | 16 | - | - |
| converters | 15 | - | - |
| converting | 16 | - | - |
| convertite | 15 | - | - |
| convertive | 18 | - | - |
| convertors | 15 | - | - |
| convexedly | 26 | - | - |
| convexness | 22 | the property possessed by a convex shape | - |
| conveyable | 20 | legally transferable to the ownership of another | - |
| convicting | 18 | - | - |
| convictism | 19 | - | - |
| convictive | 20 | - | - |
| convincers | 17 | - | - |
| convocated | 18 | - | - |
| convocates | 17 | - | - |
| convocator | 17 | - | - |
| convolutes | 15 | - | - |
| convolving | 19 | - | - |
| convolvuli | 18 | - | - |
| convulsant | 15 | - | - |
| cookhouses | 19 | - | - |
| cookshacks | 25 | - | - |
| cookstoves | 19 | - | - |
| coolheaded | 17 | marked by calm self-control (especially in trying circumstances); unemotional | stayed coolheaded in the crisis |
| coolhouses | 15 | - | - |
| coolnesses | 12 | - | - |
| countering | 13 | - | - |
| corsetries | 12 | - | - |
| cortically | 17 | with respect to the cortex | cortically induced arousal |
| corticated | 15 | - | - |
| corticoids | 15 | - | - |
| cortisones | 12 | - | - |
| coruscated | 15 | - | - |
| coruscates | 14 | - | - |
| corvetting | 16 | - | - |
| corybantes | 17 | - | - |
| corybantic | 19 | - | - |
| corydaline | 16 | - | - |
| corylopses | 17 | - | - |
| corylopsis | 17 | small genus of deciduous shrubs of temperate regions of Asia | - |
| coryneform | 20 | - | - |
| coryphaeus | 20 | - | - |
| coryphenes | 20 | - | - |
| coscripted | 17 | - | - |
| coseismals | 14 | - | - |
| coseismics | 16 | - | - |
| cosentient | 12 | - | - |
| cosherings | 16 | - | - |
| cosinesses | 12 | - | - |
| cosmetical | 16 | - | - |
| cosmically | 19 | - | - |
| cosmocrats | 16 | - | - |
| cosmodrome | 17 | - | - |
| cosmogenic | 17 | pertaining to the branch of astronomy dealing with the origin and history and structure and dynamics of the universe | - |
| cosmogonal | 15 | - | - |
| cosmogonic | 17 | pertaining to the branch of astronomy dealing with the origin and history and structure and dynamics of the universe | cosmogonic theories of the origin of the universe |
| cosmolatry | 17 | the worship of the cosmos | - |
| cosmolined | 15 | - | - |
| cosmolines | 14 | - | - |
| cosmologic | 17 | pertaining to the branch of astronomy dealing with the origin and history and structure and dynamics of the universe | cosmologic science |
| cosmonauts | 14 | - | - |
| cosmopolis | 16 | - | - |
| cosmoramas | 16 | - | - |
| cosmoramic | 18 | - | - |
| cosmotrons | 14 | - | - |
| cosponsors | 14 | - | - |
| cossetting | 13 | - | - |
| costalgias | 13 | - | - |
| costeaning | 13 | - | - |
| costlessly | 15 | - | - |
| costliness | 12 | the quality possessed by something with a great price or value | - |
| costmaries | 14 | - | - |
| costumiers | 14 | - | - |
| costumings | 15 | - | - |
| cotangents | 13 | - | - |
| cotelettes | 12 | - | - |
| cotillions | 12 | - | - |
| cotransfer | 15 | - | - |
| cotrustees | 12 | - | - |
| cottabuses | 14 | - | - |
| cottagiest | 13 | - | - |
| cottagings | 14 | - | - |
| cotterless | 12 | - | - |
| cottierism | 14 | - | - |
| cottonades | 13 | - | - |
| cottoniest | 12 | - | - |
| cottonseed | 13 | seed of cotton plants; source of cottonseed oil | - |
| cottonweed | 16 | an American everlasting having foliage with soft wooly hairs and corymbose heads with pearly white bracts | - |
| coturnixes | 19 | - | - |
| cotyledons | 16 | - | - |
| cotyliform | 20 | - | - |
| cotyloidal | 16 | of the cup-shaped socket that receives the head of the thigh bone | - |
| cotylosaur | 15 | - | - |
| couchettes | 17 | - | - |
| coulibiaca | 16 | - | - |
| coulibiacs | 16 | - | - |
| coulometer | 14 | - | - |
| coulometry | 17 | - | - |
| coumarilic | 16 | - | - |
| coumarones | 14 | - | - |
| councilmen | 16 | - | - |
| councilors | 14 | - | - |
| counselees | 12 | - | - |
| counsellee | 12 | - | - |
| counselors | 12 | - | - |
| countbacks | 20 | - | - |
| countdowns | 16 | - | - |
| counterbid | 15 | - | - |
| countercry | 17 | - | - |
| covenantor | 15 | - | - |
| covermount | 17 | - | - |
| coveralled | 16 | - | - |
| coversines | 15 | - | - |
