| Konvertit | convert |
| Konvent | convent |
| Konvexität | convexity |
| Konzertina | concertina |
| Konzetti | extended metaphor |
| Konfetti | confetti |
| Konvention | convention |
| Konversion | conversion |
| Konzert | concert |
| konvergent | convergent |
| konvers | function |
| konzertiert | concerted |
| Konfekt | candy |
| Konformist | conformist |
| Konterbier | hair of the dog |
| Kontrakt | compact contract |
| Konventikel | conventicle |
| Konvervative | conservative |
| konserviert | canned |
| Kondensat | condensate |