| Countdown | countdown |
| Touchdown | touchdown |
| Count | count |
| Counter | counter |
| Countess | countess |
| Country | country |
| County | county |
| Coupon | coupon |
| Lockdown | lockdown |
| Boomtown | boomtown |
| Chinatown | Chinatown |
| Couloir | couloir |
| Coulomb | coulomb |
| Countrysong | country song |
| Couperose | copperas |
| Court | court |
| Courtage | brokerage commission broker's fee |
| Couscous | couscous |
| Cousin | cousin |
| Couture | couture |