| Kontrahentin | opponent rival counterparty |
| Kontrahent | opponent rival counterparty |
| Kontrazeption | contraception |
| kontrazeptiv | contraceptive |
| Konkurrentin | competitor |
| Konstantin | Constantine |
| Kontraktion | contraction |
| kontrahieren | contract |
| Konkatenation | concatenation |
| Konkrement | calculus |
| Konkretion | concretion |
| Kontingent | contingent |
| kontingent | contingent |
| Kontraalt | contralto |
| Kontrakt | compact contract |
| Kontranym | contranym |
| Kontratanz | contra |
| Kontrolleurin | ticket inspector |
| kontinental | continental |
| kontrieren | double |