| Kondensation | condensation |
| Kondensator | capacitor |
| Konversation | conversation |
| Kompensation | compensation |
| Konsekration | dedication |
| Kondensat | condensate |
| Konvention | convention |
| Konzentration | concentration |
| Konduktion | conduction |
| Konkatenation | concatenation |
| Konspiration | conspiracy |
| Konsultation | consultation |
| Konurbation | conurbation |
| Kondition | condition |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Konfession | denomination |
| Konfirmation | confirmation |
| Konfiskation | confiscation |
| Konformation | conformation |
| Konfrontation | confrontation |