| Ouen | Audoin |
| ouep | yup |
| Ouessant | Ushant |
| ouest | west |
| Ouest canadien | Western Canada |
| ouest d'Afrique | West Africa |
| ouest-européen | Western European |
| ouest-indien | West Indian |
| ouest-indienne | West Indian |
| ouest-nord-ouest | west-northwest |
| ouest-quart-nord-ouest | west by north |
| ouest-quart-sud-ouest | west by south |
| ouest-sud-ouest | west-southwest |
| Ouette de la Réunion | Réunion Shelduck |
| Ouette de Magellan | Magellan Goose |
| Ouette de Maurice | Mauritian Shelduck |
| Ouette des Andes | Andean Goose |
| Ouette marine | Kelp Goose |
| Ouette à ailes bleues | Blue-winged Goose |
| Ouette à tête grise | Ashy-headed Goose |
| Ouette à tête rousse | Ruddy-headed Goose |
| ouf | phew |
| Oufa | Ufa |
| Oufa Arena | Ufa Arena |
| Ougaf | Wegaf |
| Ouganda | Uganda |
| Ougandais | Ugandan |
| Ougandaise | Ugandan |
| Ougandien | Ugandan |
| Ougandienne | Ugandan |
| Ougarit | Ugarit |
| Ougaritique | Ugaritic language |
| Ouglitch | Uglich |
| Ougra | Ugra River |
| Ougrien | Ugrian |
| Ouguiya | Mauritanian ouguiya |
| oui | yea |
| Oui emphatique | Very much so |
| Oui mais | But still |
| Ouighour | Uyghur people |
| ouistiti | marmoset |
| Ouistiti de Geoffroy | White-headed Marmoset |
| Ouistiti oreillard | Buffy-tufted Marmoset |
| Oujda | Oujda |
| Oujgorod | Uzhhorod |
| oukase | ukase |
| oukha | ukha |
| Oukhta | Ukhta |
| Oulainen | Oulainen |
| Oulan Bator | Ulaanbaatar |
| Oulan-Bator | Ulan Bator |
| Oulan-Oude | Ulan-Ude |
| Oulan-Oudé | Ulan-Ude |
| Oulema melanopus | Cereal leaf beetle |
| Oulens-sous-Echallens | Oulens-sous-Echallens |
| Oulens-sur-Lucens | Oulens-sur-Lucens |
| Ouliana Semionova | Iuliana Semenova |
| Oulianovsk | Ulyanovsk |
| Oulipo | Oulipo |
| Oulitsa Podbelskogo | Ulitsa Podbelskogo |
| Oullins | Oullins |
| Oulu | Oulu |
| Oulun | Oulun |
| Oulunsalo | Oulunsalo |
| Oum Errabiaa | Oum Er-Rbia River |
| Oum Kalsoum | Umm Khultum |
| Oum-El-Bouaghi | Oum el-Bouaghi |
| Ouman | Uman |
| Oumar Tall | Umar Tall |
| Oumm al Qaïwaïn | Umm al-Quwain |
| oumma | ummah |
| Oumpah-Pah | Oumpah-pah |
| Oumra | Umrah |
| Ouneg | Wneg |
| Ouniversitet | Universitet |
| Ounja | Unzha River |
| oup-là | upsadaisy |
| Oupanishad | Upanishad |
| Oupouaout | Wepwawet |
| Our | Our River |
| Our Airline | Our Airline |
| ouragan | hurricane |
| Ouragan Agnes | Hurricane Agnes |
| Ouragan Andrew | Hurricane Andrew |
| Ouragan Beta | Hurricane Beta |
| Ouragan Camille | Hurricane Camille |
| Ouragan capverdien | Cape Verde-type hurricane |
| Ouragan Cindy | Hurricane Cindy |
| Ouragan Dean | Hurricane Dean |
| Ouragan Dennis | Hurricane Dennis |
| Ouragan Emily | Hurricane Emily |
| Ouragan Ernesto | Hurricane Ernesto |
| Ouragan Fabian | Hurricane Fabian |
| Ouragan Felix | Hurricane Felix |
| Ouragan Floyd | Hurricane Floyd |
| Ouragan Frances | Hurricane Frances |
| Ouragan Hugo | Hurricane Hugo |
| Ouragan Ioke | Hurricane Ioke |
| Ouragan Isabel | Hurricane Isabel |
| Ouragan Ivan | Hurricane Ivan |
| Ouragan Jeanne | Hurricane Jeanne |
| Ouragan John | Hurricane John |
| Ouragan Juan | Hurricane Juan |
| Ouragan Katrina | Hurricane Katrina |
| Ouragan Lane | Hurricane Lane |
| Ouragan Mitch | Hurricane Mitch |
| Ouragan Noel | Hurricane Noel |
| Ouragan Ophelia | Hurricane Ophelia |
| Ouragan Rita | Hurricane Rita |
| Ouragan Stan | Hurricane Stan |
| Ouragan sur le Caine | The Caine Mutiny |
| Ouragan Vince | Hurricane Vince |
| Ouragan Wilma | Hurricane Wilma |
| Oural | Ural Mountains |
| ouranien | uranian |
| Ouranopithèque | Ouranopithecus macedoniensis |
| Ouranos | Uranus |
| Ouranosaure | Ouranosaurus |
| Ourapteryx | Swallow-tailed Moth |
| Ourasi | Ourasi |
| ourdir | cook up |
| Ourdir des intrigues | Blacksmiths |
| ourdou | Urdu |
| ourdoue | Urdu |
| Ourebia | Oribi |
| Ourengoï | Urengoy gas field |
| Ourguentch | Urgench |
| Ourim et Thoummim | Urim and Thummim |
| Ourim et Toumim | Urim and Thummim |
| Ourioupinsk | Uryupinsk |
| Ourique | Ourique |
| Ourjoum | Urzhum |
| ourlet | hem |
| Ourne Valley | Ourne Valley |
| Ouro Preto | Ouro Preto |
| Ouroboros | Ouroboros |
| Ouroup | Urup |
| Ourous-Martan | Urus-Martan |
| ours | bear |
