| kopflos | headless |
| Kopflaus | head louse |
| Kopilot | co-pilot copilot |
| Kopfnuss | brain-teaser |
| Kopfnuß | brainteaser |
| Kopfstoß | headbutt |
| Kopfweh | headache |
| Koppler | coupling |
| kopfig | cerebral |
| Kopf | head header heads |
| Kopula | copula |
| köpfeln | head |
| köpfen | behead decapitate top head |
| Knopfloch | buttonhole |
| Kipfl | crescent |
| hilflos | helpless |
| hornlos | hornless |
| tonlos | soundlessly |
| Koloss | colossus |
| dolos | insidious |