| Congress | le congrès |
| concentration | la concentration |
| concept | le concept |
| concern | l'intérêt/la préoccupation/préoccuper |
| concerned | préoccupé/préoccupée |
| conclude | conclure |
| concrete | concret/concrète |
| conduct | conduire/diriger/la conduite |
| conscious | conscient/consciente |
| conservative | conservateur/conservatrice |
| considerable | considérable |
| consideration | la considération |
| consist | consister |
| consistent | cohérent/cohérente |
| constant | constant/constante |
| constantly | constamment |
| construct | construire |
| construction | la construction |
| consult | consulter |
| contemporary | contemporain/contemporaine |
| content | le contenu |
| context | le contexte |
| continuous | continu/continue |
| contract | le contrat |
| contribute | contribuer |
| contribution | la contribution |
| convenience | la commodité |
| convention | la convention |
| convert | convertir |
| cooperate | coopérer |
| core | le cœur/le noyau |
| correction | la correction |
| council | le conseil |
| county | le comté |
| creation | la création |
| crisis | la crise |
| critic | la critique/le critique |
| critical | critique/crucial/cruciale |
| criticism | la critique |
| criticize | critiquer |
| crucial | crucial/cruciale |
| curriculum | le programme/le programme d'études |
| curved | courbé/courbée |
| damn | fichu/fichue/maudit/maudite |
| debt | la dette |
| decade | la décennie |