| Carbonyl | carbonyl |
| Carboxyl- | carboxylic |
| Carbonado | carbonado |
| Caron | háček |
| Carban | carbane |
| Karbonat | carbonate |
| Karbon | Carboniferous |
| Sardonyx | sardonyx |
| Paronym | near-homophone |
| Bicarbonat | bicarbonate |
| Caramel | caramel |
| Carbonylchlorid | carbonyl chloride |
| Cardinale | cardinal numeral |
| Cardy | cardoon |
| Carotin | carotene |
| Carotis | carotid |
| Decacarbonyl | decacarbonyl |
| Carina | Careen Carreen Karena Karyna |
| Carl | Carl |
| Carlow | Carlow |