| co-incinération | co-incineration |
| co-produit | by-product |
| Co-trimoxazole | Co-trimoxazole |
| co-épouse | co-wife |
| coaccusé | codefendant |
| coaccusée | codefendant |
| Coacquéreur | Joint purchaser |
| coadjuteur | coadjutor |
| Coadout | Coadout |
| coagulant | coagulant |
| coagulation | coagulation |
| Coagulation intravasculaire disséminée | Disseminated intravascular coagulation |
| coaguler | congeal |
| coagulé | clotted |
| Coahuila | Coahuila |
| Coahuiltecan | Coahuiltecan |
| Coahuilteco | Coahuilteco language |
| Coal Grove | Coal Grove |
| Coalbrookdale | Coalbrookdale |
| coalesceur | coalescer |
| coalition | alliance |
| Coalition albanaise de la vallée de Preševo | Albanian Coalition from Preševo Valley |
| Coalition de partis pour la démocratie | Coalition of Parties for Democracy |
| Coalition démocratique unitaire | Unitarian Democratic Coalition |
| Coalition jamaïcaine | Jamaica coalition |
| Coalition militaire en Irak | Multinational force in Iraq |
| Coalition pan-bleue | Pan-Blue Coalition |
| Coalition pan-verte | Pan-Green Coalition |
| Coalition sociale-libérale | Social-liberal coalition |
| coaltar | coal tar |
| Coarticulation | Coarticulation |
| coassement | croak |
| Coast Guards | The Guardian |
| coati | coati |
| Coati des montagnes | Mountain Coati |
| Coati à nez blanc | White-nosed Coati |
| Coatlicue | Coatlicue |
| coauteur | coauthor |
| coax | coaxial cable |
| coaxial | coaxial |
| cobalt | cobalt |
| Cobalte | Cobalt |
| cobaye | guinea pig |
| Cobham | Cobham |
| Cobit | COBIT |
| Coblence | Koblenz |
| COBOL | COBOL |
| Cobordisme | Cobordism |
| Cobourg | Coburg |
| cobra | cobra |
| Cobra du Cap | Cape Cobra |
| cobra indien | Indian cobra |
| Cobra Verde | Cobra Verde |
| Cobra égyptien | Egyptian cobra |
| Coburg | Coburg |
| Cobá | Coba |
| Cobée grimpante | Cobaea scandens |
| COC Nederland | COC Nederland |
| coca | Coca-Cola |
