| Koppler | coupling |
| Kuppler | matchmaker |
| Koppel | paddock coupler belt |
| Köper | twill |
| koppen | climb belch |
| Fopper | heckler |
| Komplet | compline |
| Komplex | complex |
| komplex | complex |
| Kompiler | compiler |
| Köhler | collier charburner charcoal burner pollock |
| Kopfweh | headache |
| Kopiar | cartulary |
| Kopplung | coupling |
| Kopte | Copt |
| Kopeke | copeck kopeck |
| Kopie | copy duplicate blueprint manifold replica replication print reprint |
| Kopierer | photocopier copier |
| Kopilot | co-pilot copilot |
| Kopula | copula |