| Ursa Major | Osa Mayor |
| Ursa Minor | Osa Menor |
| Ursa Minor Dwarf | Osa Menor |
| Ursenbach | Ursenbach |
| ursid | Ursidae |
| ursine | osuno |
| Ursins | Ursins |
| Ursula | Úrsula |
| Ursula Andress | Ursula Andress |
| Ursulines | Religiosas Ursulinas de la Unión Romana |
| Ursus | Ursus |
| Ursus Breweries | Ursus |
| Ursus Tractor Factory | Ursus |
| Ursy | Ursy |
| Urtenen-Schönbühl | Urtenen-Schönbühl |
| Urtica dioica | Urtica dioica |
| Urtica urens | Urtica urens |
| Urticaceae | Urticaceae |
| Urticales | Urticales |
| urticaria | urticaria |
| Urtijëi | Ortisei |
| Uruapan | Uruapan |
| Urubamba Province | Provincia de Urubamba |
| Urubamba River | Río Urubamba |
| Urubú Sign Language | Lengua de señas Urubu-Kaapor |
| Uruguaiana | Uruguaiana |
| Uruguay | Uruguay |
| Uruguay Montevideo | Uruguay Montevideo Fútbol Club |
| Uruguay national football team | Selección de fútbol de Uruguay |
| Uruguay national rugby union team | Selección de rugby de Uruguay |
| Uruguay River | Río Uruguay |
| Uruguay v Brazil | Maracanazo |
| Uruguayan | uruguayo |
| Uruguayan Civil War | Guerra Grande |
| Uruk | Uruk |
| Uruk period | Período de Uruk |
| Urukagina | Urukagina |
| Urumaco | Municipio Urumaco |
| Urumi | Kalaripayatu |
| Urusei Yatsura | Urusei Yatsura |
| urushiol | urushiol |
| Uryū Ishida | Uryû Ishida |
| us | nos |
| US American | estadounidense |
| US ARMY | Ejército |
| US citizen | América |
| US Créteil-Lusitanos | Union Sportive Créteil-Lusitanos |
| US declares vital interest in space | Estados Unidos proclama hegemonía en el espacio |
| US dollar | dólar de EE.UU. |
| US General invokes right against self-incrimination in Abu Ghraib case | General estadounidense invoca el derecho a la no autoincriminación en caso de Abu Ghraib |
| US Open | Abierto de los Estados Unidos |
| US Senate says no to pullout of US troops from Iraq | El Senado de Estados Unidos rechaza retirar las tropas de Iraq |
| US Virgin Islands | Islas Vírgenes Americanas |
| USA | Estados Unidos |
| USA national basketball team | Selección de baloncesto de Estados Unidos |
| USA Perpignan | Union Sportive Arlequine Perpignan |
| usability | provecho |
| Usability testing | Prueba de usabilidad |
| usable | operable |
| usable width | ancho utilizable |
| usableness | provecho |
| usage | costumbre |
| Usages of Barcelona | Usatges de Barcelona |
| Usagi Yojimbo | Usagi Yojimbo |
| USB | USB |
| USB flash drive | Memoria USB |
| USB hub | Hub USB |
| USB mass storage device class | USB mass storage device class |
| USB port | puerto USB |
| USCGC Eagle | Águila |
| Uscio | Puerta |
| USDA soil taxonomy | Soil Taxonomy |
| use | gastar |
| Use case diagram | Diagrama de casos de uso |
| use force on | intimidar |
| use magic | hacer trucos mágicos |
| Use of the circumflex in French | Uso del acento circunflejo en francés |
| Use of Weapons | El uso de las armas |
| use something against someone | usar algo en contra de alguien |
| use sparingly | conservar |
| use the familiar form | tutear |
| use threats against | amenazar |
| use too much | exagerar |
| use up | gastar |
| Use-wear analysis | Trazalogía |
| used | usado |
| used to | soler |
| Usedom | Usedom |
| useful | positivo |
| useful idiot | idiota útil |
| usefull | util |
| usefully | útilmente |
| usefulness | uso |
| useless | infructuoso |
