| konfirmatorisch | confirmatory |
| informatorisch | informational |
| kombinatorisch | combinatorial |
| konformistisch | conformist |
| Konfirmation | confirmation |
| inflammatorisch | inflammatory |
| respiratorisch | respiratory |
| obligatorisch | obligatory compulsory |
| Konservatorium | conservatoire |
| konfuzianisch | Confucian |
| konsularisch | consular |
| Konformation | conformation |
| konzentrisch | concentric concentrical |
| ökonometrisch | econometric econometrical |
| klimatisch | climatic climatical climatically |
| änigmatisch | enigmatic puzzling |
| dilatorisch | dilatory |
| imperatorisch | imperatorial |
| masturbatorisch | masturbatory |
| mediatorisch | mediatory |