| direktional | directional |
| Direktion | administration department |
| bidirektional | bidirectional |
| Diktionär | dictionary |
| fiktional | fictional |
| irrational | irrational |
| dimensional | dimensional |
| Direktive | directive |
| Direktor | manager director headmaster principal senior vice president |
| Direktorin | headmistress director manager |
| direktiv | directive |
| Erektion | erection |
| Rektion | case government government |
| Bijektion | bijection |
| Dejektion | dejecta |
| Dissektion | dissection |
| Funktional | functional |
| funktional | functional |
| Reaktionär | reactionary |
| reaktionär | reactionary |