| Konzeption | conception |
| konzeptionell | conceptual |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Konvention | convention |
| Konzession | concession admission licence |
| Konduktion | conduction |
| Konkretion | concretion |
| Konsumtion | consumption |
| Kontrazeption | contraception |
| Konzertina | concertina |
| Konzetti | extended metaphor |
| Kondition | condition |
| Konfession | denomination |
| Konsumption | merger consumption |
| Konversion | conversion |
| Konzept | draft concept conception |
| konzeptuell | conceptual |
| Exzeption | exception |
| Perzeption | perception |
| Rezeption | reception reception desk perception |