| Konvulsion | convulsion |
| Konfusion | bewilderment |
| Konkussion | concussion |
| Konversion | conversion |
| konvulsiv | convulsive |
| Konduktion | conduction |
| Konsumtion | consumption |
| Kontorsion | contortion |
| Konfession | denomination |
| Konklusion | conclusion |
| Konvention | convention |
| Konzession | concession admission licence |
| Kollusion | collusion |
| Konkretion | concretion |
| Konsultation | consultation |
| Kondition | condition |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Kongolesin | Congolese |
| Konjugation | conjugation |
| Konjunktion | conjunction |