| Kabukitheater | kabuki |
| Amphitheater | amphitheater amphitheatre |
| Affentheater | charade |
| Katheter | catheter |
| Musiktheater | music theatre |
| Fabulierer | fabulist |
| Filmtheater | cinema |
| Herzkatheter | cardiac catheter heart catheter intracardiac catheter |
| Katheder | lectern |
| Kathete | cathetus |
| Theater | theatre theater ruckus |
| Haupttäter | principal |
| Sanitäter | paramedic |
| kastrierter | wether |
| Babysitter | babysitter baby-sitter |
| Kalorimeter | calorimeter |
| Kubikmeter | cubic metre cubic meter |
| Kabotage | cabotage |
| Kabelleger | cable layer cable-laying ship cablecaster |
| Kabinett | cabinet |