| Konsultation | consultation |
| Konsekration | dedication |
| Konspiration | conspiracy |
| Konsumtion | consumption |
| Konurbation | conurbation |
| Konjugation | conjugation |
| Konnotation | connotation |
| Konstellation | constellation |
| Konstitution | constitution |
| Konsumption | merger consumption |
| Konziliation | reconciliation settlement |
| Okkultation | occultation |
| Kommutation | substitution test |
| Koagulation | coagulation |
| Kopulation | copulation |
| Kondensation | condensation |
| Konduktion | conduction |
| Konfabulation | confabulation |
| Konfirmation | confirmation |
| Konfiskation | confiscation |