| Konstrukteur | designer constructer constructor |
| Konstruktor | constructor |
| Instrukteur | instructor |
| Kondukteur | bus conductor |
| Konstruktion | construction |
| Kontraktur | contracture |
| konstruktiv | design constructive |
| Kontrolleur | ticket inspector |
| konstruiert | inkhorn |
| Instruktor | instructor |
| Struktur | structure |
| Kontrakt | compact contract |
| Konjektur | conjecture |
| Konjunktur | economic situation boom |
| Konservator | conservator |
| Konsorte | consortium member |
| Konsortium | consortium |
| Konstante | constant |
| Konstituente | constituent |
| Kontrafaktur | contrafact |