| Oberstleutnant | Lieutenant Colonel Wing Commander lieutenant colonel wing commander |
| Oberleutnant | first lieutenant lieutenant |
| Generalleutnant | lieutenant general |
| Unterleutnant | second lieutenant underlieutenant |
| Oberstaat | suzerain |
| Oberleitung | catenary overhead line overhead wire |
| Übersteuern | oversteer |
| übersteuern | oversteer |
| Zerstreutheit | absent-mindedness |
| Leutnant | lieutenant |
| Oberbeleuchter | gaffer |
| Oberdeutsch | Upper German |
| oberdeutsch | Southern German |
| Oberseite | upper side |
| Oberstufe | sixth form |
| obengenannt | above-mentioned |
| oberster | supreme |
| Oberschenkel | thigh |
| Oberschlesien | Upper Silesia |
| Oberschrank | wall cupboard |