| Konklusion | conclusion |
| Konfusion | bewilderment |
| Konkussion | concussion |
| Inklusion | inclusion |
| Okklusion | occlusion |
| Kollusion | collusion |
| Konkretion | concretion |
| Kontorsion | contortion |
| Konfession | denomination |
| Konversion | conversion |
| Konvulsion | convulsion |
| Konzession | concession admission licence |
| Exklusion | exclusion |
| Kollision | collision |
| Koevolution | coevolution |
| Konduktion | conduction |
| Konsumtion | consumption |
| Kondition | condition |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Kongolesin | Congolese |