| kongenial | congenial |
| kongenital | congenital |
| Kondensat | condensate |
| konvivial | convivial |
| tangential | tangential |
| genial | brilliant ingenious |
| kolonial | colonial |
| kollegial | collegial |
| Konvent | convent |
| Konventikel | conventicle |
| Konvexität | convexity |
| Königsenkel | prince |
| Können | competence ability |
| können | can be able to may be allowed to know |
| kontinental | continental |
| Konkani | Konkani |
| Konsens | consensus consent |
| Konsensus | consensus |
| Konvention | convention |
| Konzentrat | concentrate |