| Konzentrat | concentrate |
| Konzentration | concentration |
| Kondensat | condensate |
| Konzert | concert |
| konzentriert | concentrated focused |
| Kontrakt | compact contract |
| Konvent | convent |
| Konvertit | convert |
| Konvexität | convexity |
| Konzertina | concertina |
| Konzetti | extended metaphor |
| Konizität | conicity |
| Kontra | con double |
| kontra | against versus |
| Kontrast | contrast |
| Konvention | convention |
| Konzept | draft concept conception |
| Konzeption | conception |
| Konzern | group combine concern trust |
| Konzerthaus | concert hall concert house |