| 236 | concern |
| 589 | conclude |
| 744 | concentrate |
| 831 | concept |
| 879 | conclusion |
| 1512 | concrete |
| 2412 | concede |
| 2433 | conceive |
| 2750 | conceal |
| 249 | condition |
| 648 | conduct |
| 2452 | condemn |
| 2687 | condense |
| 2991 | conduction |
| 2500 | cone |
| 403 | conference |
| 725 | confirm |
| 1173 | conflict |
| 1610 | confine |
| 1698 | confidence |
| 1709 | confuse |
| 1731 | confident |
| 2584 | confront |
| 3061 | confer |
| 3062 | configuration |
| 2708 | congratulate |
| 996 | congress |
| 684 | connect |
| 911 | connection |
| 2983 | conquer |
