| Kondeszendenz | condescension |
| Korrespondenz | correspondence |
| Deszendent | descendant |
| Konsequenz | consequence |
| kondensieren | condense precipitate |
| Sondersendung | special |
| Korrespondent | correspondent |
| Transzendenz | transcendence transcendency |
| Koaleszenz | coalescence |
| Antezedenz | antecedent |
| Konnossement | bill of lading |
| Konvaleszenz | convalescence |
| Konvenienzehe | marriage of convenience |
| Königsenkel | prince |
| Kondolenz | condolence |
| Konferenz | conference |
| Konfidenz | confidence trust |
| Konservendose | can tin |
| Konsistenz | consistency |
| Kontingenz | contingency attunement |