| old-established | antigo |
| old-fashioned | antiquado |
| old-time | velho |
| old-timer | carro antigo |
| Oldboy | Oldboy |
| Oldenburg | Oldemburgo |
| older | maior |
| oldest | mais velho |
| Oldest child | Eldest |
| Oldest people | Decano da Humanidade |
| Oldfield Thomas | Oldfield Thomas |
| Oldham County | Condado de Oldham |
| oldish | idoso |
| Oldman River | Rio Oldman |
| Oldmeldrum | Oldmeldrum |
| oldnessrtisement | antigüidade |
| Oldsmobile | Oldsmobile |
| oldster | velho |
| Olduvai Gorge | Garganta de Olduvai |
| Ole Einar Bjørndalen | Ole Einar Bjørndalen |
| Ole Gunnar Solskjær | Ole Gunnar Solskjær |
| Ole Rømer | Ole Rømer |
| Olea | Olea |
| Oleaceae | Oleaceae |
| oleaginous | oleaginoso |
| oleander | oleandro |
| olefine | olefina |
| Oleg | Oleg |
| Oleg Blokhin | Oleg Blokhin |
| Oleg Deripaska | Oleg Deripaska |
| Oleg Kotov | Oleg Kotov |
| Oleg Kuznetsov | Oleg Kuznetsov |
| Oleg Losev | Oleg Vladimirovich Losev |
| Oleg Makarov | Oleg Makarov |
| Oleg of Novgorod | Oleg |
| Oleg Protasov | Oleg Protasov |
| Oleg Romantsev | Oleg Romantsev |
| Oleg Salenko | Oleg Salenko |
| Oleguer Presas | Oleguer Presas |
| Oleksandr Shovkovskiy | Oleksandr Shovkovsky |
| Oleksandriia | Alexandria |
| Olenekian | Olenekiano |
| oleograph | oleografia |
| olfactory | olfatório |
| olfactory pollution | poluição olfactiva |
| Olga | Olga |
| Olga Benário Prestes | Olga Benário Prestes |
| Olga Korbut | Olga Korbut |
| Olga of Kiev | Olga Prekrasa |
| Olga Rozanova | Olga Rosanova |
| Olgiate Comasco | Olgiate Comasco |
| Olhos de Água | Olhos de Água |
| Olhão | Olhão |
| olibanum | incenso |
| Oliena | Oliena |
| Olifant | Olifante |
| oligarchic | oligárquico |
| oligarchy | oligarquia |
| Oligocene | Oligoceno |
| Oligochaeta | Oligochaeta |
| Oligonucleotide | Oligonucleotídeo |
| oligopoly | oligopólio |
| Olimpia | Olímpia |
| Olimpia Asunción | Club Olímpia |
| Olimpiysky National Sports Complex | Estádio Olímpico de Kiev |
| Olimpo de Bahía Blanca | Club Olimpo de Bahía Blanca |
| Olinda | Olinda |
| Olingo | Olingo |
| Olinia | Olinia |
| olive | azeitona |
| Olive Baboon | Babuíno |
| olive grove | olival |
| olive oil | azeite de oliva |
| olive oil mill wastewater | águas ruças |
| Olive Oyl | Olívia Palito |
| olive tree | oliveira |
| Olive Warbler | Peucedraminae |
| olive-tree | oliveira |
| Olive-wood | Oliveira |
| oliveer | olivai |
| Oliveira | Oliveira |
| Oliveira de Azeméis | Oliveira de Azeméis |
| Oliveira de Frades | Oliveira de Frades |
| Oliveira do Hospital | Oliveira do Hospital |
| Olivenza | Olivença |
| oliveple | azeitona |
| Oliver | Oliveira |
| Oliver Bierhoff | Oliver Bierhoff |
| Oliver Cromwell | Oliver Cromwell |
| Oliver Goldsmith | Oliver Goldsmith |
| Oliver Hardy | Oliver Hardy |
| Oliver Hazard Perry class frigate | Classe Oliver Hazard Perry |
| Oliver Heaviside | Oliver Heaviside |
| Oliver Joseph Lodge | Oliver Lodge |
| Oliver Kahn | Oliver Kahn |
| Oliver Neuville | Oliver Neuville |
| Oliver Norvelle Hardy | Oliver Hardy |
| Oliver Riedel | Oliver Riedel |
| Oliver Sacks | Oliver Sacks |
| Oliver Smithies | Oliver Smithies |
| Oliver Stone | Oliver Stone |
| Oliver Tambo | Oliver Tambo |
| Olivera Jevtić | Olivera Jevtić |
| Olives | Oliveira |
| Olivia de Havilland | Olivia de Havilland |
| Olivia Lufkin | OLIVIA |
| Olivia Newton-John | Olivia Newton-John |
| Olivier Blanchard | Olivier Blanchard |
| Olivier de Clisson | Olivier de Clisson |
| Olivier Grouillard | Olivier Grouillard |
| Olivier Messiaen | Olivier Messiaen |
| Olivier Panis | Olivier Panis |
| Olivier van Noort | Olivier van Noort |
| Olivine | Olivina |
| Oliwa | Oliwa |
| Ollantaytambo | Ollantaytambo |
| Ollantaytambo District | Ollantaytambo |
| Ollastra Simaxis | Ollastra |
| Olli Wisdom | Space Tribe |
| Ollon | Ollon |
| Olmec | Olmecas |
| Olmeca | Olmecas |
| Olof Palme | Olof Palme |
| Olof Rudbeck the Younger | Olof Rudbeck o jovem |
| Olof Skötkonung | Olavo da Suécia |
| Olof Swartz | Olof Peter Swartz |
| Olof Vilhelm Arrhenius | Olof Vilhelm Arrhenius |
| Olokun | Olokun |
| Olomouc | Olomouc |
| Olomouc District | Olomouc |
| Olomouc Region | Olomouc |
| Olomouc Synagogue | Sinagoga |
| Olorotitan | Olorotitan |
| OLPC | XO |
| Olpe | Olpe |
| Olsztyn | Olsztyn |
| OLT | Olt |
| Olt County | Olt |
| Olten | Olten |
| Oltenia | Oltênia |
| Olusegun Obasanjo | Olusegun Obasanjo |
| Olympe de Gouges | Olympe de Gouges |
| Olympia | Olímpia |
| Olympia Dukakis | Olympia Dukakis |
| Olympiacos | Olympiacos |
| Olympiacos BC | Olympiacos |
| Olympiacos FC | Olympiacos |
| Olympiacos SC | Olympiacos |
| olympiad | Olimpíada |
