| Oskar-Helene-Heim | U-Bahnhof Oskar-Helene-Heim |
| Oskari Tokoi | Oskari Tokoi |
| Oskarshamn Municipality | Oskarshamn |
| Oskarshamn Nuclear Power Plant | Kernkraftwerk Oskarshamn |
| Oskemen | Öskemen |
| Oskol River | Oskol |
| Osler's disease | Morbus Osler |
| Osler-Weber-Rendu disease | Morbus Osler-Rendu-Weber |
| Osler-Weber-Rendu syndrome | Osler-Syndrom |
| Oslip | Oslip |
| Oslo | Oslo |
| Oslo ... | Osloer ... |
| Oslo Accords | Oslo-Friedensprozess |
| Oslo Cathedral | Osloer Dom |
| Oslo City Hall | Rathaus von Oslo |
| Oslo Fiord | Oslofjord |
| Oslo Stock Exchange | Osloer Börse |
| Oslo Stock Exchange , OSE | Osloer Börse |
| Oslo T-bane | Oslo T-bane |
| Oslo, August 31st | Oslo, 31. August |
| Osloer Straße | U-Bahnhof Osloer Straße |
| Oslofjord | Oslofjord |
| Oslotunnelen | Oslotunnel |
| Osloß | Osloß |
| Osman | Osman |
| Osman I | Osman I. |
| Osman Nuri Paşa | Nuri Pascha Osman |
| Osman Sabri | Osman Sebrî |
| Osmaniye Province | Osmaniye |
| Osmanli | Liste der Sultane des Osmanischen Reichs |
| Osmanli Dynasty | Liste der Sultane des Osmanischen Reichs |
| Osmanli Turkish | das Osmanische |
| Osmanthus | Duftblüten |
| Osmanthus fragrans | Süße Duftblüte |
| Osmanya alphabet | Osmaniya-Schrift |
| Osmeriformes | Stintartige |
| osmeteria | Nackengabeln |
| Osmeterium | Osmaterium |
| osmidrosis | übelriechender Schweiß |
| osmium | Osmium |
| osmium atom | Osmium-Atom |
| osmium atoms | Osmium-Atome |
| osmium compound | Osmiumverbindung |
| osmium dioxide | Osmiumdioxid |
| osmium dust | Osmiumstaub |
| osmium fluoride | Osmiumfluorid |
| osmium iodide | Osmiumiodid |
| osmium isotope | Osmium-Isotop |
| osmium oxide | Osmiumoxid |
| osmium poisoning | Osmiumvergiftung |
| Osmium tetroxide | Osmiumtetroxid |
| osmium trioxide | Osmiumtrioxid |
| Osmo Vänskä | Osmo Vänskä |
| Osmoderma eremita | Eremit |
| osmolagnia | Geruchsfetischismus |
| osmolarity | Osmolarität |
| Osmole | Osmolarität |
| osmophobia | Osmophobie |
| osmophore | Geruchsträger |
| osmosed liquid | durch Osmose übergegangene Flüssigkeit |
| osmosis | Osmose |
| osmosis process | Osmoseverfahren |
| osmotherapy | Osmotherapie |
| osmotic | osmotisch |
| osmotic adjustment | osmotische Anpassung |
| osmotic diuresis | osmotische Diurese |
| osmotic power plant | Osmosekraftwerk |
| osmotic power station | Salzgradientenkraftwerk |
| Osmunda | Königsfarne |
| Osmunda regalis | Königsfarn |
| Osmundaceae | Königsfarngewächse |
| osmunds | Königsfarne |
| Osmussaar | Osmussaar |
| Osnabrueck | Osnabrück |
| Osnabrück | Osnabrück |
| Osnabrück Central Station | Osnabrück Hauptbahnhof |
| Osogbo | Oshogbo |
| Osogna | Osogna TI |
| Osona | Grafschaft Osona |
| Osorkon the Elder | Osochor |
| Osorno Province | Osorno |
| Osoto Gari | O-Soto-Gari |
| Ospedale degli Innocenti | Ospedale degli Innocenti |
