| Coordinate system | Coordinated Universal Time | Coordinates (mathematics) |
| Coordination complex | Coordination number | Coosa County, Alabama |
| Cop Out (2010 film) | COP22 | COP8 |
| Copa Airlines | Copa America 2007 | Copa Libertadores |
| Copake, New York | Copan, Oklahoma | COPD |
| Cope, South Carolina | Copeland Center for Wellness and Recovery | Copeland, Kansas |
| Copemish, Michigan | Copenhagen | Copenhagen Airport |
| Copenhagen interpretation | Copenhagen, New York | Copepod |
| Copepoda | Copernican principle | Copernicia |
| Copernicia alba | Copernicia glabrescens | Copernicia humicola |
| Copernicia oxycalyx | Copernicia prunifera | Copernicium |
| Copernicus | Copertino | COPI |
| Copiano | COPII | Copley Medal |
| Copolymer | Coppell, Texas | Copper |
| Copper aspirinate | Copper benzoate | Copper Canyon, Texas |
| Copper City, Michigan | Copper extraction techniques | Copper gluconate |
| Copper indium gallium selenide | Copper loss | Copper oxide |
| Copper silicide | Copper storage disease | Copper wire and cable |
| Copper(I) acetylide | Copper(I) bromide | Copper(I) chloride |
| Copper(I) cyanide | Copper(I) fluoride | Copper(I) iodide |
| Copper(I) oxide | Copper(II) acetate | Copper(II) azide |
| Copper(II) bromide | Copper(II) carbonate | Copper(II) chloride |
| Copper(II) fluoride | Copper(II) hydroxide | Copper(II) nitrate |
| Copper(II) oxide | Copper(II) sulfate | Copper(II) triflate |
| Copperas Cove, Texas | Copper–chlorine cycle | Copperbelt Province |
| Copperhill, Tennessee | Coppertone Loquat | Coppock, Iowa |
| Coprinaceae | Coprinus | Coprinus amphibius |
| Coprinus aquatilis | Coprinus arenarius | Coprinus candidatus |
| Coprinus collinus | Coprinus comatus | Coprinus flavus |
| Coprinus microsporus | Coprinus nemoralis | Coprinus pallidissimus |
| Coprinus silvaticus | Coprinus stellatus | Coprinus velox |
| Coproduction (society) | Coprophilia | Coprotus niveus |
| Coptic TV | Coptis | Coptis chinensis |
| Coptoideae | Coptology | Copts |
| Copula (linguistics) | Copula linguae | Copyleft |
| Copyright | Copyright abolition | Copyright infringement |
| Copywriter | Copywriting | Coquelles |
| Coquette (film) | Coquille, Oregon | Cor triatriatum |
| Coracias | Coracias abyssinicus | Coracias benghalensis |
| Coracias caudatus | Coracias cyanogaster | Coracias garrulus |
| Coracias naevia | Coracias naevius | Coracias spatulatus |
| Coracias temminckii | Coracii | Coraciidae |
| Coraciiformes | Coracioidea | Coracobrachialis muscle |
| Coragyps atratus | Coraima Torres | Coral |
| Coral 66 | Coral cut | Coral Gables, Florida |
| Coral reef | Coral reef fish | Coralan |
| Coraline (film) | Corallium rubrum | Corals |
| Coralville, Iowa | Corana | Corazón valiente |
| Corazon Aquino | CORBA | Corbehem |
| Corbel | Corbin Bleu | Corbin, Kentucky |
| Corbula | Corchorus | Corchorus olitorius |
| Corcoran, Minnesota | Cord blood | Cordeauxia |
| Cordeauxia edulis | Corded Ware culture | Cordele, Georgia |
| Cordell Hull | Cordem. | Cordia |
| Cordia africana | Cordia americana | Cordia bahamensis |
| Cordia glabrata | Cordia iberica | Cordia inermis |
| Cordia myxa | Cordia silvestris | Cordia sinensis |
| Cordia subcordata | Cordioideae | Cordite |
| Cordova, Alaska | Cordova, Illinois | Cordova, Nebraska |
| Cordova, South Carolina | Cordyceps | Cordycipitaceae |
| Cordyline | Cordyline australis | Cordyline banksii |
| Cordyline fruticosa | Cordyline petiolaris | Cordyline rubra |
| Core competency | Core Design | Core eudicots |
| Core i7 | Core i7 proccessor | Core product |
| Coregonidae | Coregoninae | Coregonus |
| Coregonus alpenae | Coregonus alpinus | Coregonus arenicolus |
| Coregonus artedi | Coregonus austriacus | Coregonus autumnalis |
| Coregonus baicalensis | Coregonus bavaricus | Coregonus candidus |
| Coregonus chadary | Coregonus clupeaformis | Coregonus clupeoides |
| Coregonus confusus | Coregonus danneri | Coregonus duplex |
| Coregonus fera | Coregonus hiemalis | Coregonus hoyi |
| Coregonus huntsmani | Coregonus johannae | Coregonus laurettae |
| Coregonus lavaretus | Coregonus maraena | Coregonus maxillaris |
| Coregonus megalops | Coregonus muksun | Coregonus nasus |
| Coregonus nelsonii | Coregonus nigripinnis | Coregonus nobilis |
| Coregonus oxyrinchus | Coregonus reighardi | Coregonus sardinella |
| Coregonus subautumnalis | Coregonus ussuriensis | Coregonus wartmanni |
| Coregonus widegreni | Coregonus zuerichensis | Coregulation |
| Corel | Corel Painter | Corel Photo-Paint |
| Corel VideoStudio | CorelDraw | CorelDRAW |
| Coreopsideae | Coreopsidinae | Coreopsis |
| Coreopsis abyssinica | Coreopsis angustifolia | Coreopsis arizonica |
| Coreopsis aurea | Coreopsis brasiliensis | Coreopsis californica |
| Coreopsis coronata | Coreopsis gigantea | Coreopsis grandiflora |
| Coreopsis insularis | Coreopsis integra | Coreopsis integrifolia |
| Coreopsis intermedia | Coreopsis lanceolata | Coreopsis maritima |
| Coreopsis mutica | Coreopsis nodosa | Coreopsis peruviana |
| Coreopsis pulchra | Coreopsis rosea | Coretta Scott King |
| Corey Brewer | Corey Bringas | Corey May |
| Corey Maynard | Corfu, New York | Cori cycle |
| Corian | Coriandreae | Coriandrum |
| Coriandrum digitatum | Coriandrum latifolium | Coriandrum maritimum |
| Coriandrum melphitense | Coriandrum sativum | Coriandrum setifolium |
| Coriandrum tordylium | Corideae | Corin Nemec |
| Corinna, Maine | Corinne, Utah | Corinth (village), New York |
| Corinth, Arkansas | Corinth, Kentucky | Corinth, Maine |
| Corinth, Mississippi | Corinth, New York | Corinth, Texas |
| Corinth, Vermont | Corinthian order | Coriolis effect |
| Coris | Coris (fish) | Coris (plant) |
| Coris atlantica | Coris aurilineata | Coris aygula |
