| Kolporteur | colporter colporteur |
| Koloratur | coloratura |
| Exporteur | exporter |
| Importeur | importer |
| Kompositeur | composer |
| Kollaborateur | collaborator |
| Kolosseum | Colosseum |
| Kolosser | Colossian Colossians |
| Kolostrum | colostrum beestings foremilk |
| Kolter | doona |
| kolportieren | spread hawk |
| Porter | porter |
| Reporter | reporter |
| opportun | opportune suitable |
| Kohorte | cohort |
| Konsorte | consortium member |
| Konsortium | consortium |
| Körperteil | body part |
| Kopfsteuer | poll tax |
| Skulpteur | sculptor |