| Cornanae | Corne de Sorebois | Cornea |
| Cornea plana | Cornea plana 1 | Cornea plana 2 |
| Corneal abrasion | Corneal epithelium | Corneal limbus |
| Corneal ulcer | Corned beef | Corneille Heymans |
| Cornelia de Lange Syndrome | Cornelia Funke | Cornelia, Georgia |
| Cornelis Kalkman | Corneliu Papură | Corneliu Robe |
| Cornelius the Centurion | Cornelius Van Alen Van Dyck | Cornelius Vanderbilt |
| Cornelius, North Carolina | Cornelius, Oregon | Cornell Glen |
| Cornell Township, Michigan | Cornell University | Cornell, Illinois |
| Cornell, Wisconsin | Corner kick | Cornerstone |
| Cornersville, Tennessee | Cornettes de Bise | Corniche |
| Cornidae | Corning (city), New York | Corning, Arkansas |
| Corning, Iowa | Corning, Kansas | Corning, Missouri |
| Corning, Ohio | Corning, Wisconsin | Cornish Rex |
| Cornish, Maine | Cornish, New Hampshire | Cornish, Oklahoma |
| Cornish, Utah | Cornlea, Nebraska | Cornmeal |
| Corno Campascio | Corno di Gesero | Cornu aspersum |
| Cornu spiral | Cornucopia | Cornus |
| Cornus mas | Cornus meyeri | Cornus sanguinea |
| Cornville, Maine | Cornwall | Cornwall, Connecticut |
| Cornwall, New York | Cornwall, Vermont | Corolla |
| Corollary | Corona | Corona (footballer) |
| Corona Australis | Corona Borealis | Corona di Redorta |
| Corona ring | Corona, New Mexico | Corona, South Dakota |
| Coronado, California | Coronagraph | Coronal loop |
| Coronal plane | Coronary artery bypass surgery | Coronary artery disease |
| Coronary care unit | Coronary circulation | Coronary flow reserve |
| Coronary ischemia | Coronary ostial stenosis | Coronary reflex |
| Coronary sinus | Coronatae | Coronation |
| Coronaviridae | Coronavirus | Coroner |
| Coronilla | Coronilla atlantica | Coronilla aurantiaca |
| Coronilla coronata | Coronilla emerus | Coronilla hispanica |
| Coronilla iberica | Coronilla juncea | Coronilla minima |
| Coronilla myrtifolia | Coronilla pubescens | Coronilla ramosissima |
| Coronilla repanda | Coronilla scorpioides | Coronilla stipularis |
| Coronilla vaginalis | Coronilla valentina | Coronilla viminalis |
| Coronoid process | Corophiidea | Corpa |
| Corpora | Corpora amylacea | Corporate capabilities package |
| Corporate farming | Corporate finance | Corporate governance |
| Corporate governance of information technology | Corporate identity | Corporate liability |
| Corporate recovery | Corporate social entrepreneurship | Corporate social responsibility |
| Corporate tax | Corporate transparency | Corporation |
| Corporatism | Corpse Bride | Corpus |
| Corpus allatum | Corpus callosum | Corpus cavernosum penis |
| Corpus Christi, Texas | Corpus linguistics | Corpus luteum |
| Corrado Gini | Corrado Guzzanti | Corral City, Texas |
| Corral de Almaguer | Correction fluid | Correctional medicine |
| Correctionville, Iowa | Corrective and preventive action | Corrective lens |
| Corrective rape | Correll, Minnesota | Corriere della Sera |
| Corrigan, Texas | Corrosion | Corrosion engineering |
| Corrosive | Corrosive substance | Corruption |
| Corruption in Cameroon | Corruption Perceptions Index | Corry Evans |
| Corry, Pennsylvania | Corsa | Corset |
| Corsica, South Dakota | Corsicana, Texas | Corteolona |
| Cortex (anatomy) | Cortez, Colorado | Cortical lobule |
| Cortical spreading depression | Corticata | Corticon |
| Corticosteroid | Corticotropin-releasing factor family | Corticotropin-releasing hormone |
| Corticoviridae | Corticovirus | Cortisol |
| Cortisol awakening response | Cortland, Illinois | Cortland, Nebraska |
| Cortland, New York | Cortland, Ohio | Cortlandville, New York |
| Corumbá | Corundum | Corunna, Indiana |
| Corunna, Michigan | Corvidae | Corviglia |
| Corvin Castle | Corvino San Quirico | Corvoidea |
| Corvus | Corvus (constellation) | Corvus albus |
| Corvus brachyrhynchos | Corvus caurinus | Corvus corax |
| Corvus cornix | Corvus corone | Corvus coronoides |
| Corvus frugilegus | Corvus hawaiiensis | Corvus monedula |
| Corvus ossifragus | Corvus rhipidurus | Corvus ruficollis |
| Corvus splendens | Corwin, Ohio | Corwith Township, Michigan |
| Corwith, Iowa | Cory | Cory Edwards |
| Cory Gibbs | Cory Jefferson | Cory Monteith |
| Corybas | Coryciinae | Corycium |
| Corycium alticola | Corycium bicolorum | Corycium bifidum |
| Corycium carnosum | Corycium crispum | Corycium deflexum |
| Corycium excisum | Corycium flanaganii | Corycium microglossum |
| Corycium mundii | Corycium nigrescens | Corycium orobanchoides |
| Corycium patersoniae | Corycium tricuspidatum | Corycium vestitum |
| Corydon sumatranus | Corydon, Indiana | Corydon, Iowa |
| Corydon, Kentucky | Corydoras | Corydoras adolfoi |
| Corydoras aeneus | Corydoras paleatus | Corylus |
| Corylus americana | Corylus avellana | Corylus colurna |
| Corynebacteriaceae | Corynebacterineae | Corynebacterium |
| Corynebacterium bovis | Corynebacterium canis | Corynebacterium casei |
| Corynebacterium caspium | Corynebacterium confusum | Corynebacterium diphtheriae |
| Corynebacterium durum | Corynebacterium flavescens | Corynebacterium genitalium |
| Corynebacterium glaucum | Corynebacterium lowii | Corynebacterium marinum |
| Corynebacterium minutissimum | Corynebacterium oculi | Corynebacterium pilosum |
| Corynebacterium propinquum | Corynebacterium pseudodiphtheriticum | Corynebacterium pseudotuberculosis |
| Corynebacterium simulans | Corynebacterium striatum | Corynebacterium ulcerans |
| Corynebacterium urealyticum | Corynebacterium variabile | Corypha |
| Corypha glaucescens | Corypha lecomtei | Corypha macropoda |
| Corypha microclada | Corypha taliera | Corypha umbraculifera |
| Corypha utan | Coryphaena hippurus | Corypheae |
| Coryphoideae | Corytophanidae | Cosby, Missouri |
| Coscoroba coscoroba | Coset | Coshocton, Ohio |
| Cosinus Hyperbolique | Coslada | Cosmic Background Explorer |
| Cosmic distance ladder | Cosmic dust | Cosmic microwave background |
| Cosmic microwave background polarization | Cosmic pluralism | Cosmic ray |
| Cosmic ray spallation | Cosmic rays | Cosmid |
| Cosmin Contra | Cosmin Moţi | Cosmin Moți |
