| Konturentreue | definition |
| Konferenzraum | meeting room |
| Königstreue | royalism |
| konturieren | outline |
| Kontrebande | contraband |
| Kontrolleur | ticket inspector |
| Kontrollraum | control room |
| Königstreuer | royalist |
| kontextfrei | context-free |
| kontinental | continental |
| kontrieren | double |
| Kondukteur | bus conductor |
| Konkretum | concrete noun |
| Konkurrent | competitor |
| Konkurrentin | competitor |
| Konkurrenz | competition competitor |
| Konstrukteur | designer constructer constructor |
| Konsument | consumer |
| Konterschraube | counter screw |
| Kontextmenü | context menu |