| Konquistador | conquistador |
| Rekonquista | Reconquista |
| Konautor | coauthor |
| Kondensator | capacitor |
| Konditor | confectioner |
| Inquisitor | inquisitor |
| Louisdor | louis d'or |
| Donaustadt | Donaustadt |
| Konduktion | conduction |
| Konfuzianer | Confucian |
| Konstanze | Constance |
| Konsultation | consultation |
| Konsumtion | consumption |
| Kontor | office |
| Königstiger | Bengal tiger |
| Kondition | condition |
| Kondor | condor |
| Kondukteur | bus conductor |
| Konfiskation | confiscation |
| Konfusion | bewilderment |