| Coulomb | coulomb |
| Coulombsch | coulombic |
| Coulombkraft | Coulomb force |
| Couloir | couloir |
| Colombo | Colombo |
| Cölom | coelom |
| Couleur | color colour trump caliber calibre hue kind |
| Coupon | coupon |
| Aplomb | aplomb |
| Couch | couch |
| Cougar | cougar |
| Count | count |
| Counter | counter |
| Country | country |
| County | county |
| Coup | coup |
| Coupage | coupage |
| Couplet | couplet |
| Coupé | coupé coupe |
| Courage | courage |