| Konfiguration | configuration |
| Konfabulation | confabulation |
| Konfirmation | confirmation |
| Konfiskation | confiscation |
| Konföderation | confederation |
| Präfiguration | prefiguration |
| Konsekration | dedication |
| Konspiration | conspiracy |
| Konurbation | conurbation |
| konfigurieren | configure form |
| Konformation | conformation |
| Konfrontation | confrontation |
| Konjugation | conjugation |
| Konzentration | concentration |
| Konziliation | reconciliation settlement |
| Infiltration | infiltration |
| Transfiguration | transfiguration |
| Inauguration | inauguration |
| Kolligation | colligation |
| Koagulation | coagulation |