| Konsumption | merger consumption |
| Konsumtion | consumption |
| Konduktion | conduction |
| Konsultation | consultation |
| Konjugation | conjugation |
| Konjunktion | conjunction |
| Konzeption | conception |
| Korruption | corruption |
| Konkretion | concretion |
| Konsekration | dedication |
| Konspiration | conspiracy |
| Konurbation | conurbation |
| Kondition | condition |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Konfirmation | confirmation |
| Konformation | conformation |
| Konfusion | bewilderment |
| Konkussion | concussion |
| Konnotation | connotation |
| Konstantin | Constantine |