| Kopenhagener | Copenhagener Danish pastry |
| Kopenhagenerin | Copenhagener |
| Kopenhagen | Copenhagen |
| Kopfjäger | headhunter |
| Tropenhygiene | tropical hygiene |
| Kappensäger | merganser |
| Pentameter | pentameter |
| Kommagene | Commagene |
| Hörensagen | hearsay |
| Totenlager | deathbed |
| Pergamener | Pergamenian |
| Kenianer | Kenyan |
| Koreaner | Korean |
| Kopfnicken | nod |
| Kopfschlagader | carotid |
| Kopfsteuer | poll tax |
| Kopfhörer | headphone |
| Kopierer | photocopier copier |
| Koprophagie | coprophagy |
| Köpfchen | brain head |