| Konzerthaus | concert hall concert house |
| Konzertsaal | concert hall |
| Konzertina | concertina |
| Konzentrat | concentrate |
| Konzert | concert |
| Konzertreise | concert tour |
| Königshaus | royal family |
| konzertiert | concerted |
| Kornhaus | granary |
| Oberhaus | upper house upper chamber House of Lords |
| Opernhaus | opera house opera |
| Unterhaus | lower chamber lower house House of Commons |
| Kontaktzaun | electric fence |
| Konterschnaps | hair of the dog |
| Konvertit | convert |
| Konzeptalbum | concept album |
| Konzertflügel | concert grand |
| Konzertierung | conciliation |
| Konzetti | extended metaphor |
| Konjektur | conjecture |