| Carboxyl- | carboxylic |
| Carbonyl | carbonyl |
| Carbonado | carbonado |
| Caracalla | Caracalla |
| Caramel | caramel |
| Cardinale | cardinal numeral |
| Cardy | cardoon |
| Caron | háček |
| Carotin | carotene |
| Carotis | carotid |
| Carambola | carambola |
| Carban | carbane |
| Cargohose | cargo pants cargo trousers |
| Carl | Carl |
| Carlow | Carlow |
| Caroline | Caroline |
| Carport | carport |
| Cartoon | cartoon |
| Garbologe | garbologist |
| Karbonat | carbonate |