| konventionell | conventional |
| Konventionen | decorum |
| konzeptionell | conceptual |
| unkonventionell | unconventional |
| Konventikel | conventicle |
| Konvention | convention |
| Konvenienzehe | marriage of convenience |
| konjunktional | conjunctional |
| konventionelle Waffen | conventional weapon |
| Konditional | conditional conditional mood |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Konversion | conversion |
| Konzeption | conception |
| konstitutionell | constitutional |
| konvenient | convenient |
| konvenieren | be suitable |
| konvertieren | convert |
| Invention | invention |
| potentiell | potential |
| intentional | intentional |