| opportun | opportune suitable |
| Opportunist | opportunist timeserver temporizer |
| Opportunität | appropriateness |
| Opportunistin | opportunist |
| inopportun | inconvenient |
| Opportunismus | opportunism |
| importun | annoying |
| Oppeln | Opole |
| Opperment | orpiment |
| Opponent | adversary |
| Opponentin | adversary |
| Opposition | opposition |
| opportunistisch | opportunistic timeserving |
| Ippon | ippon |
| Rapport | report intercourse |
| Support | support |
| Emporion | emporium |
| Exportgut | export |
| Importgut | import |
| Sporran | sporran |