| Kontrazeption | contraception |
| kontrazeptiv | contraceptive |
| Kontrahentin | opponent rival counterparty |
| Kontraktion | contraction |
| Kontrazeptivum | contraceptive |
| Konzeption | conception |
| Konkretion | concretion |
| Kontribution | tribute |
| Konkatenation | concatenation |
| Konurbation | conurbation |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Konfrontation | confrontation |
| Kongratulation | congratulation |
| Konstruktion | construction |
| Konsumption | merger consumption |
| Kontamination | amalgam blending |
| Kontemplation | contemplation |
| Kontrahent | opponent rival counterparty |
| Konvention | convention |
| Konzession | concession admission licence |