| Cantus firmus | Cantus firmus |
| Cantù | Cantù |
| Canucks de Vancouver | Vancouver Canucks |
| canular | leg-pull |
| Canular de Taxil | Taxil hoax |
| Canular du monoxyde de dihydrogène | Dihydrogen monoxide hoax |
| Canular téléphonique | Prank call |
| canule | cannula |
| Canule de Guedel | Oropharyngeal airway |
| Canut | Canut |
| canyon | canyon |
| Canyon Dam | Canyon Dam |
| Canyon De Chelly National Monument | Canyon de Chelly National Monument |
| Canyon du Sumidero | Sumidero Canyon |
| Canyonisme | Canyoning |
| Canzo | Canzo |
| Canéphore | Kanephoros |
| Cao | APC |
| Cao Cao | Cao Cao |
| Cao Huan | Cáo Huàn |
| Cao Pi | Cao Pi |
| Cao Zhi | Cao Zhi |
| CAO électronique | Electronic design automation |
| caodaïsme | Cao Dai |
| Caorle | Caorle |
| Caorso | Caorso |
| Caouanne | Loggerhead Sea Turtle |
| Caours | Caours |
| caoutchouc | rubber |
| caoutchoucs | rubbers |
| caoutchouter | rubberize |
| caoutchouteux | tough |
| cap | cape |
| Cap Adare | Cape Adare |
| Cap Arcona | Cap Arcona |
| Cap Arctique | Arctic Cape |
| Cap Baba | Cape Baba |
| Cap Blanc | Ras ben Sakka |
| Cap Blanc-Nez | Cap Blanc Nez |
| Cap Bon | Cap Bon |
| Cap Boujdour | Cape Bojador |
| Cap Byron | Cape Byron |
| Cap Canaveral | Cape Canaveral |
| Cap Cod | Cape Cod |
| Cap Columbia | Cape Columbia |
| Cap Corse | Cap Corse |
| Cap de Bonne Espérance | Cape of Good Hope |
| Cap de Bonne-Espérance | Cape of Good Hope |
| Cap de Creus | Cap de Creus |
| Cap de la Hague | La Hague |
| Cap de la Nao | Cap de la Nau |
| Cap de Long | Cap de Long |
| Cap de Trafalgar | Cape Trafalgar |
| Cap Dejnev | Cape Dezhnev |
| Cap des Aiguilles | Cape Agulhas |
| Cap Evans | Cape Evans |
| Cap Finisterre | Cape Finisterre |
| Cap Foulwind | Cape Foulwind |
| Cap Froward | Cape Froward |
| Cap Gardafui | Cape Guardafui |
| Cap Girão | Cabo Girão |
| Cap Gris-Nez | Cap Gris Nez |
| Cap Hatteras | Cape Hatteras |
| Cap Horn | Cape Horn |
| Cap Leeuwin | Cape Leeuwin |
| Cap Morris Jesup | Cape Morris Jesup |
| Cap Nordkinn | Cape Nordkinn |
| Cap Ouest | Western Cape |
| Cap Prince-de-Galles | Cape Prince of Wales |
| Cap Sōya | Cape Sōya |
| Cap Vert | Cape Verde |
| Cap-du-Nord | Northern Cape |
| Cap-Haïtien | Cap-Haïtien |
| Cap-Occidental | Cape |
| Cap-Oriental | Eastern Cape |
| Cap-Verdien | Cape Verdean |
| Cap-Verdienne | Cape Verdean |
| Cap-Vert | Cape Verde |
| Capability Brown | Capability Brown |
