| Oligarch | oligarch |
| Oligarchie | oligarchy |
| Oligurie | oliguria |
| Asiarch | Asiarch |
| Plutarch | Plutarch |
| oligotroph | oligotrophic |
| oligozän | Oligocene |
| Oligozän | Oligocene |
| Goliath | Goliath |
| Oligomer | oligomer |
| Oligopol | oligopoly |
| Oliver | Oliver |
| Solitär | solitaire |
| solitär | solitary |
| politisch | political |
| solidarisch | in solidarity |
| äolisch | eolic |
| ölig | oily |
| Ligase | ligase |
| Liga | league |