| Knock-out | knock-out |
| Work-out | workout |
| Krocket | croquet |
| Kick-off | kick-off |
| Workout | workout |
| Blackout | blackout |
| Knochen- | skeletal |
| Knochenhaut | periosteum |
| Knossos | Knossos |
| knochig | bony |
| Knochen | bone dog bone spanner dog bone wrench |
| Knopfloch | buttonhole |
| Know-how | know-how |
| Knöchel | ankle knuckle |
| knöchern | bony cold |
| Nocken | cam |
| Nöck | nix |
| Nocebo | nocebo |
| Nocke | nock |
| Blockbau | log cabin |