| Konversationslexikon | encyclopedia |
| Konvektionsregen | convectional rainfall |
| Konversation | conversation |
| Kondensationsflasche | Leyden jar |
| Konventionen | decorum |
| Ortslexikon | gazetteer |
| konfessionslos | nonsectarian |
| Ionisationsleistung | ionization power |
| Ionisationssensor | ionisation sensors |
| Kompensationsebene | compensation depth |
| Operationszeichen | operator |
| Kondensation | condensation |
| Konfessionsfreier | nonsectarian |
| Konfessionsloser | nonsectarian |
| Konfessionslosigkeit | nonsectarianism |
| Konterrevolution | counterrevolution |
| Konvervative | conservative |
| Onomatopoietikon | onomatopoeia |
| konfessionsfrei | nonsectarian |
| konvertible Mark | convertible mark |