| kontrovers | controversial |
| Kontroverse | controversy dispute |
| Kontroller | controller |
| konvers | function |
| Konterbier | hair of the dog |
| Kontor | office |
| Kontrollen | control |
| Kontrolleur | ticket inspector |
| konstruiert | inkhorn |
| kontrieren | double |
| Kongress | congress convention |
| Konter | counter-attack |
| Kontrabass | double bass double-bass |
| Kontrahent | opponent rival counterparty |
| Kontrolle | inspection control |
| konter- | counter- |
| kontern | counter |
| kontrolliert | controlled certified checked |
| konträr | contrarian contrary adverse |
| Controller | controller |