| Konvexlinse | convex lens |
| Konvexität | convexity |
| Kontaktlinse | contact lens |
| Konvent | convent |
| Konventikel | conventicle |
| Konventionen | decorum |
| Konvertit | convert |
| Konzertina | concertina |
| Kongolese | Congolese |
| Konkubine | concubine |
| Konsens | consensus consent |
| Konvention | convention |
| Konvergenz | convergence |
| Konversion | conversion |
| konvenient | convenient |
| konvenieren | be suitable |
| konvergent | convergent |
| konvergieren | converge |
| konvers | function |
| konversieren | converse make conversation |