| Karabinerhaken | carabiner |
| Karabiner | carabiner |
| Kleiderhaken | coathook |
| Karabinier | carabinier |
| karikieren | caricature cartoon |
| arabisieren | Arabize |
| paradieren | flaunt |
| Kabinenhaube | canopy |
| Containerhafen | container port |
| Kräuterhexen | cunning folk |
| Widerhaken | barb |
| Karambolagen | billiards |
| Kardinale | cardinal numeral |
| Karolinen | Caroline Islands |
| Karrieristin | careerist |
| Karriertaube | English Carrier |
| Karzinogen | carcinogen |
| karzinogen | carcinogenic |
| Karawanserei | caravansary caravanserai |
| Karbunkel | carbuncle |