| oba | hurrah |
| Obadias | Book of Obadiah |
| Obala | Obala |
| Obaluaiyê | Babalu Aye |
| Oban | Oban |
| Oban Star Racers | Ōban Star-Racers |
| obcecado | obsessed |
| obcecadoncia | obsessednce |
| OBD | On-Board Diagnostics |
| Obducção | Obduction |
| Obdulio Jacinto Varela | Obdulio Varela |
| Obdurodon dicksoni | Obdurodon |
| obedecer | mind |
| obedecer a | comply with |
| obedeça | obey |
| obediente | well-behaved |
| obedientemente | dutifully |
| obediência | compliance |
| obediência (a padrões) | compliance |
| obelisco | obelisk |
| Obelisco Espacial | Space Needle |
| Obelix | Obelix |
| Oberallgäu | Oberallgäu |
| Oberaudorf | Oberaudorf |
| Oberbalm | Oberbalm |
| Oberbergischer Kreis | Oberbergischer Kreis |
| Oberbergkirchen | Oberbergkirchen |
| Oberboihingen | Oberboihingen |
| Oberbüren | Oberbüren |
| Oberdachstetten | Oberdachstetten |
| Oberderdingen | Oberderdingen |
| Oberding | Oberding |
| Oberdischingen | Oberdischingen |
| Oberdolling | Oberdolling |
| Oberegg | Oberegg |
| Oberembrach | Oberembrach |
| Oberems | Oberems |
| Oberengstringen | Oberengstringen |
| Oberentfelden | Oberentfelden |
| Oberfranken | Upper Franconia |
| Obergebra | Obergebra |
| Obergesteln | Obergesteln |
| Obergröningen | Obergröningen |
| Obergösgen | Obergösgen |
| Oberhaching | Oberhaching |
| Oberhallau | Oberhallau |
| Oberharmersbach | Oberharmersbach |
| Oberhausen | Oberhausen |
| Oberhausen-Rheinhausen | Oberhausen-Rheinhausen |
| Oberhavel | Oberhavel |
| Oberhelfenschwil | Oberhelfenschwil |
| Oberhofen am Thunersee | Oberhofen am Thunersee |
| Oberiberg | Oberiberg |
| Oberickelsheim | Oberickelsheim |
| Oberkirch | Oberkirch |
| Oberkochen | Oberkochen |
| Oberkommando der Wehrmacht | Oberkommando der Wehrmacht |
| Oberkotzau | Oberkotzau |
| Oberkulm | Oberkulm |
| Oberlangenegg | Oberlangenegg |
| Oberlunkhofen | Oberlunkhofen |
| Obermarchtal | Obermarchtal |
| Obermeitingen | Obermeitingen |
| Obermichelbach | Obermichelbach |
| Oberndorf | Oberndorf am Neckar |
| Oberndorf in Tirol | Oberndorf in Tirol |
| Oberneukirchen | Oberneukirchen |
| Obernheim | Obernheim |
| Obernzenn | Obernzenn |
| Oberon | Oberon |
| Oberpframmern | Oberpframmern |
| Oberpöring | Oberpöring |
| Oberried am Brienzersee | Oberried am Brienzersee |
| Oberrieden | Oberrieden |
| Oberriet | Oberriet |
| Oberriexingen | Oberriexingen |
| Oberrohrdorf | Oberrohrdorf |
| Oberrot | Oberrot |
| Oberrüti | Oberrüti |
| Obersaxen | Obersaxen |
| Oberscheinfeld | Oberscheinfeld |
| Oberschleißheim | Oberschleißheim |
| Oberschneiding | Oberschneiding |
| Oberschweinbach | Oberschweinbach |
| Obersiggenthal | Obersiggenthal |
| Obersontheim | Obersontheim |
| Oberspreewald-Lausitz | Oberspreewald-Lausitz |
| Oberstadion | Oberstadion |
| Oberstenfeld | Oberstenfeld |
| Oberstocken | Oberstocken |
| Obersulm | Obersulm |
| Obersüßbach | Obersüßbach |
| Oberteuringen | Oberteuringen |
| Obertrubach | Obertrubach |
| Oberurnen | Oberurnen |
| Oberuzwil | Oberuzwil |
| Oberwil im Simmental | Oberwil im Simmental |
| Oberwil-Lieli | Oberwil-Lieli |
| Oberwolfach | Oberwolfach |
| Oberá | Oberá |
| Oberägeri | Oberägeri |
| obesidade | corpulence |
| obeso | stout |
| Obfelden | Obfelden |
| Obi-Wan Kenobi | Obi-Wan Kenobi |
| Obilić | FK Obilić |
| obituário | obituary notice |
| OBJ | Obj |
| Object Linking and Embedding | Object Linking and Embedding |
| Object Management Group | Object Management Group |
| Object Orientation | Object-oriented programming |
| Object-modeling technique | Object-modeling technique |
| Objectif Lune | Destination Moon |
| Objective-C | Objective-C |
| objectivos de qualidade | quality objective |
| objectivos de qualidade do ambiente | environmental quality objective |
| objectivos micro-económicos | goal of individual economic business |
| objecto | object |
| Objecto plutoniano | Pluto prototype |
| Objecto transneptuniano | Trans-Neptunian object |
| objecções | objection |
| objetar | object |
| objetar a | object to |
| objetiva | objective |
