| Kontrafaktur | contrafact |
| Kontraktur | contracture |
| Kontraalt | contralto |
| Kontrakt | compact contract |
| Kontrastfigur | foil |
| Kontratanz | contra |
| Kontrolleur | ticket inspector |
| kontrazeptiv | contraceptive |
| Konjektur | conjecture |
| Konjunktur | economic situation boom |
| Konstrukteur | designer constructer constructor |
| Konstruktor | constructor |
| Kontakt | contact |
| Kontrabass | double bass double-bass |
| Kontrahent | opponent rival counterparty |
| Kontrahentin | opponent rival counterparty |
| Kontraktion | contraction |
| Kontrapunkt | counterpoint |
| Kontrast | contrast |
| Kontrollturm | control tower |