| Konferenzraum | meeting room |
| Konferenzsaal | meeting room |
| Konferenz | conference |
| Kofferraum | trunk boot car boot |
| Kontrollraum | control room |
| Konturentreue | definition |
| Konservatorium | conservatoire |
| Konfidenz | confidence trust |
| Konkretum | concrete noun |
| Konterschraube | counter screw |
| Konvergenz | convergence |
| Konzentrat | concentrate |
| Konzerthaus | concert hall concert house |
| konferieren | confer |
| Inferenz | inference |
| Differenzial | differential |
| differenzial | differential |
| Kofferdamm | cofferdam |
| Offertorium | offertory |
| Kofferdam | dental dam cofferdam rubber dam |