| opzoeken | besuchen |
| opzuigen | aufsaugen |
| opzuigend | saugfähig |
| Opzullik | Silly |
| opzwellen | anschwellen |
| opzwellend | anschwellend |
| Opzwelling | Schwellung |
| Opéra Bastille | Opéra Bastille |
| Opéra comique | Opéra comique |
| Opéra Garnier | Opéra Garnier |
| Opéra-Comique | Opéra-Comique |
| OR | OR |
| oraal | mündlich |
| Oracle | Oracle |
| Oracle Corporation | Oracle |
| Oradea | Oradea |
| Oradell | Oradell |
| Oradour-sur-Glane | Oradour-sur-Glane |
| orakel | Orakel |
| Orakel van Delphi | Orakel von Delphi |
| Orakel van Dodona | Dodona |
| orakelachtig | orakelhaft |
| Oral history | Mündliche Überlieferung |
| Orale seks | Oralverkehr |
| Oran | Oran |
| Orang oetan | Orang-Utan |
| Orang Pendek | Orang Pendek |
| orang-oetan | Orang-Utan |
| orang-oetang | Orang-Utan |
| Orang-oetans | Orang-Utans |
| Orange | Orange |
| Orange County | Orange County |
| Orange County Choppers | Orange County Choppers |
| Orange Cove | Orange Cove |
| Orange Park | Orange Park |
| Orange Walk | Orange Walk District |
| orangeade | Orangeade |
| Orangeburg County | Orangeburg County |
| Orangevale | Orangevale |
| Orani | Orani |
| Orania | Orania |
| Oranienbaum | Oranienbaum |
| Oranienburg | Oranienburg |
| Oranienburger Straße | Oranienburger Straße |
| oranje | orange |
| Oranje Alternatief | Orange Alternative |
| Oranje havikskruid | Orangerotes Habichtskraut |
| Oranje iepentakvlinder | Schlehenspanner |
| Oranje luzernevlinder | Postillon |
| Oranje Orde | Oranier-Orden |
| Oranje Vrijstaat | Oranje-Freistaat |
| Oranje wortelboorder | Ampfer-Wurzelbohrer |
| Oranje zandoogje | Amaryllis |
| Oranje-Nassau | Oranien |
| oranjeappel | Apfelsine |
| Oranjegroene melkzwam | Edelreizker |
| oranjerie | Orangerie |
