| Uomo-Che-Teme-Il-Suo-Cavallo | Young Man Afraid Of His Horses |
| Uomo-lucertola della palude mineraria di Scape | Lizard Man of Scape Ore Swamp |
| uomo-lupo | werewolf |
| Uors | Uors |
| uose | spat |
| uova | spawn |
| Uova alla coque | Soft-boiled egg |
| uova di pesce | hard roe |
| uova di rana | frogspawn |
| Uova fatali | The Fatal Eggs |
| uova strapazzate | scrambled eggs |
| uovo | ovum |
| Uovo al guscio | Soft-boiled egg |
| uovo al tegame | fried egg |
| uovo al tegamino | egg sunny-side up |
| uovo all'occhio di bue | egg sunny-side up |
| uovo alla coque | soft-boiled |
| uovo bazzotto | soft-boiled |
| uovo di Pasqua | Easter egg |
| Uovo Fabergé | Fabergé egg |
| Uovo fritto | Fried egg |
| uovo strapazzato | scrambled |
| Up the Bracket | Up the Bracket |
| Upa | Upa River |
| Upaniṣad | Upanishad |
| UPC | UPC |
| Uplink | Telecommunications link |
| upload | upload |
| Upper Memory Area | Upper Memory Area |
| uppercut | uppercut |
| Uppland | Uppland |
| Upplands Väsby | Upplands Väsby Municipality |
| Upplands-Bro | Upplands-Bro Municipality |
| Uppsala | Uppsala |
| Uppvidinge | Uppvidinge Municipality |
| Upsilon Andromedae | Upsilon Andromedae |
| Upton-upon-Severn | Upton-upon-Severn |
| Upuaut | Wepwawet |
| Upupa antaios | Giant Hoopoe |
| Upupa epops | Hoopoe |
| UQ | UQ |
| uquaglianza | par |
| Ur | Ur |
| Ur-Nammu | Ur-Nammu |
| Ur-Nanshe | Ur-Nanshe |
| Uracile | Uracil |
| uragano | hurricane |
| uragano di proteste | storm of protests |
| Uragano Katrina | Hurricane Katrina |
| Uragano rosso | Red Storm Rising |
| Uraj | Uray |
| Ural | Ural |
| Ural Airlines | Ural Airlines |
| Urali | Ural Mountains |
| Uralsk | Uralsk |
| Urania | Urania |
| Uraniborg | Uraniborg |
| Uranico | Uranium |
| Uraniidae | Uraniidae |
| uranile | uranyl |
| uraninite | uraninite |
| uranio | uranium |
| Uranio Antonino | Uranius |
| uranio arricchito | enriched uranium |
| uranio impoverito | depleted uranium |
| Uranismo | Uranian |
| Urano | Uranus |
| Uranofano | Uranophane |
| Uranometria | Uranometria |
| Uranopilite | Uranopilite |
| Urartu | Urartu |
| Urashima Tarō | Urashima Tarō |
| Urato ossidasi | Urate oxidase |
| Urawa Red Diamonds | Urawa Red Diamonds |
| Urawa-shi | Urawa-shi |
| Urbain Le Verrier | Urbain Le Verrier |
| Urban fantasy | Urban fantasy |
| Urban Hymns | Urban Hymns |
| urbanismo | town planning |
| urbanista | town planner |
| urbanistica | town-planing |
