| kontrazeptiv | contraceptive |
| Kontrazeptivum | contraceptive |
| Kontrazeption | contraception |
| Kontrahentin | opponent rival counterparty |
| Kontrahent | opponent rival counterparty |
| Kontraalt | contralto |
| Kontrakt | compact contract |
| Konzetti | extended metaphor |
| konfrontativ | confrontational contrastive |
| Kontrafaktur | contrafact |
| Kontraktion | contraction |
| Kontraktur | contracture |
| Kontrast | contrast |
| Konzept | draft concept conception |
| Konzeption | conception |
| konativ | conative |
| konstruktiv | design constructive |
| kontemplativ | contemplative |
| kontraintuitiv | counterintuitive |
| konzessiv | concessive |