| Olympiacos SC | Olympiakos Pireo |
| olympiad | olimpiade |
| Olympiakos | Olympiakos Pireo |
| Olympiakos Nicosia | Olympiakos Nicosia |
| Olympian | olimpico |
| Olympic | olimpico |
| Olympic Airlines | Olympic Airlines |
| Olympic Anthem | Inno olimpico |
| Olympic Flame | Fiamma olimpica |
| Olympic Games | Olimpiadi |
| Olympic Marmot | Marmota olympus |
| Olympic motto | Motto olimpico |
| Olympic National Park | Parco nazionale di Olympic |
| Olympic Oath | Giuramento olimpico |
| Olympic Peninsula | Olympique Marsiglia |
| Olympic Stadium | Stadio Olimpico di Berlino |
| Olympic symbols | Simboli olimpici |
| Olympics | Olimpiadi |
| Olympiodorus | Olimpiodoro di Tebe |
| Olympiodorus of Thebes | Olimpiodoro di Tebe |
| Olympique de Marseille | Olympique Marsiglia |
| Olympique Lyonnais | Olympique Lyonnais |
| Olympisch Stadion | Stadio Olimpico |
| Olympos | Olympos |
| Olympus | Olimpo |
| Olympus Corporation | Olympus |
| Olympus Mons | Olympus Mons |
| Olyokminsk | Olëkminsk |
| Olza River | Alnus |
| Oláibar | Olaibar |
| Oléron | Oléron |
| Olímpia | Olimpia |
| Om mani padme hum | Om mani padme hum |
| Om River | Aum |
| Omagua | Kambeba |
| Omaha | Omaha |
| Omaha Beach | Omaha Beach |
| Omaha class cruiser | Classe Omaha |
| Omake | Omake |
| Oman | Oman |
| Omar | Omar |
| Omar Abdel-Rahman | Omar Abdel-Rahman |
| Omar al-Bashir | Omar Hassan Ahmad al-Bashir |
| Omar Al-Ghamdi | Omar Al-Ghamdi |
| Omar Bongo | Omar Bongo |
| Omar Bradley | Omar Bradley |
| Omar Epps | Omar Epps |
| Omar Khayyám | Omar Khayyam |
| Omar Mukhtar | Omar al-Mukhtar |
| Omar Pène | Omar Pène |
| Omar Sharif | Omar Sharif |
| Omar Sívori | Enrique Omar Sivori |
| Omar Torrijos | Omar Torrijos |
| Omari Tetradze | Omari Tetradze |
| Omastar | Omastar |
| omasum | terzo stomaco |
| ombudsman | ombudsman |
| ombudswoman | ombudswoman |
| Omdurman | Omdurman |
| omega | omega |
| Omega Centauri | Omega Centauri |
