| Kookkurrenz | co-occurrence |
| Konkurrenz | competition competitor |
| Konkurrenz- | competitive |
| Konkurrent | competitor |
| Rekurrenz | recurrence |
| Kookaburra | kookaburra |
| kooptieren | co-opt coopt |
| konkurrenzlos | unrivaled |
| rekurrent | recurrent |
| Konkurrentin | competitor |
| Knurren | growl |
| knurren | growl rumble |
| knurrend | snarling |
| Kohärenz | coherence |
| Konferenz | conference |
| Korpulenz | corpulence |
| Konvergenz | convergence |
| kooperieren | co-operate |
| Gokkun | gokkun |
| Okkupant | occupant |