| Kontraktur | contracture |
| Kontrakt | compact contract |
| Kontrafaktur | contrafact |
| Konjektur | conjecture |
| Konjunktur | economic situation boom |
| Konstrukteur | designer constructer constructor |
| Konstruktor | constructor |
| Kontakt | contact |
| Kontraktion | contraction |
| Kontrast | contrast |
| konträr | contrarian contrary adverse |
| Korrektur | correction |
| Koloratur | coloratura |
| Kontaktzaun | electric fence |
| Kontraalt | contralto |
| Kontranym | contranym |
| Kontrastfigur | foil |
| Kontratanz | contra |
| Kontrolleur | ticket inspector |
| Konautor | coauthor |