| Kolbenente | red-crested pochard |
| Kragenente | harlequin duck |
| Komponente | component |
| Kolbenhirse | foxtail millet |
| Kolbenmotor | piston engine |
| Koloquinte | colocynth |
| Kolben | club mace piston butt spadix flask |
| Kollekte | offertory |
| Kolonne | convoy fractionating column |
| Halbebene | half-plane |
| Affenente | freckled duck |
| Lappenente | musk duck |
| Wochenende | weekend |
| Kontinent | continent |
| Kriekente | teal |
| Löffelente | shoveler |
| Polente | cop |
| kompetent | competent |
| konvenient | convenient |
| könnte | might |