| colloquiale | colloquial |
| colloquialismo | colloquialism |
| colloquialmente | colloquially |
| colloquio | dialogue |
| colloquio a quattrocchi | tête-à-tête |
| collosità | stickiness |
| colloso | tacky |
| collottola | cervix |
| Collserola | Serra de Collserola |
| collusione | scheme |
| Colluto | Coluthus |
| collutorio | mouthwash |
| colluttorio | mouthwash |
| colluvium | colluvium |
| Collège de France | Collège de France |
| Collégien | Collégien |
| collòquio | conversation |
| Colm Meaney | Colm Meaney |
| colma | replete |
| Colmar | Colmar |
| colmare | fill up |
| Colmareccio | Bridge |
| Colmars-les-Alpes | Colmars-les-Alpes |
| Colmberg | Colmberg |
| colmo | brimful |
| Colo-Colo | Colo-Colo |
| Colobinae | Colobinae |
| Coloboma | Coloboma |
| colocasia | taro |
| colofonia | rosin |
| cologaritmo | cologarithm |
| Cologny | Cologny |
| colomba | pigeon |
| Colomba pasquale | Colomba Pasquale |
| colombaia | dovecote |
| colombario | columbarium |
| Colombella | Columbidae |
| Colombes | Colombes |
| Colombey-les-Deux-Églises | Colombey-les-Deux-Églises |
| Colombia | Colombia |
| Colombia Britannica | British Columbia |
| colombiana | Colombian |
| colombiano | Colombian |
