| Konrad | Conrad |
| Konoid | conoid |
| Kontra | con double |
| kontra | against versus |
| konkav | concave |
| kontra- | counter- |
| konträr | contrarian contrary adverse |
| Einrad | unicycle |
| Kornrade | corncockle |
| Konche | conche apse |
| Kontor | office |
| Kontrakt | compact contract |
| Könige | Kings |
| Können | competence ability |
| können | can be able to may be allowed to know |
| konfus | confused |
| könnte | might |
| Koncha | apse |
| Kondom | condom rubber |
| Kondor | condor |