| Ur-Nammu | Ur-Nammu |
| Uracile | Uracilo |
| Urania | Urania |
| Uraniborg | Uraniborg |
| Uranie | Urania |
| Uraniidae | Uraniidae |
| uranium | uranio |
| Uranium appauvri | Uranio empobrecido |
| uranium enrichi | uranio enriquecido |
| Uranometria | Uranometria |
| Uranoscope | Pez rata |
| Uranoscopidae | Miracielo |
| Urantia | Urantia |
| Uranus | Urano |
| Urartu | Urartu |
| Urawa Red Diamonds | Urawa Red Diamonds |
| urbain | cortés |
| Urbain Ier | Urbano I |
| Urbain II | Urbano II |
| Urbain III | Urbano III |
| Urbain IV | Urbano IV |
| Urbain Le Verrier | Urbain Le Verrier |
| Urbain V | Urbano V |
| Urbain VI | Urbano VI |
| Urbain VII | Urbano VII |
| Urbain VIII | Urbano VIII |
| Urban | Urban |
| Urbana | Urbana |
| urbanisation | urbanización |
| urbanisme | urbanismo |
| urbaniste | planificador urbano |
| Urbano Navarrete | Urbano Navarrete |
| Urbin | Urbino |
| Urbino | Urbino |
| Urby Emanuelson | Urby Emanuelson |
| Urd | Urðr |
| Urdiain | Urdiáin |
| Urduliz | Urdúliz |
| Ure | Ur |
| uretère | uréter |
| Urgal | Úrgalo |
| Urgell | Urgel |
| urgence | urgencia |
| urgent | urgente |
| Urho Kekkonen | Urho Kekkonen |
| Uri | Uri |
| Uri Avnery | Uri Avnery |
| Uri Geller | Uri Geller |
| Uri Lupolianski | Uri Lupolianski |
| Urial | Ovis vignei |
| Uribe | Uribe |
| Uridine | Uridina |
| Urie | Urías |
| Urie le Hittite | Urías el hitita |
| Uriel da Costa | Uriel da Costa |
| urinaire | urinario |
| urine | orina |
| uriner | orinar |
| urinoir | orinal |
| urique | úrico |
| Urkabustaiz | Urcabustaiz |
| Urmein | Urmein |
| urne | urna |
| Urnäsch | Urnäsch |
| Urochordata | Urochordata |
| Urocyon | Urocyon |
| Urodèle | Salamandra salamandra |
| urologie | urología |
| urologique | urológico |
| urologue | urólogo |
| Urolophidae | Urolophidae |
| Urophilie | Urolagnia |
| Uroplatus | Uroplatus |
| Uroplatus fimbriatus | Uroplatus fimbriatus |
| Urpmi | Urpmi |
| Urraque Ire de Castille | Urraca de León y Castilla |
| Urretxu | Villarreal de Urrechua |
| Urruti | Francisco Javier González Urruticoechea |
| Ursenbach | Ursenbach |
| Ursidae | Ursidae |
| Ursins | Ursins |
| URSS | URSS |
| URSS sous Staline | Historia de la URSS |
| Ursula Andress | Ursula Andress |
| Ursule | Úrsula |
| Ursulines du Coeur de Jésus Agonisant | Congregacion de Hermanas Ursulinas del Corazon de Jesus Agonizante |
| Ursus | Ursus |
| Ursy | Ursy |
| Urtenen-Schönbühl | Urtenen-Schönbühl |
| Urticaceae | Urticaceae |
| urticaire | urticaria |
| Urticales | Urticales |
| Urubu noir | Coragyps atratus |
| Urubu à tête jaune | Cathartes burrovianus |
| Urubu à tête rouge | Cathartes aura |
| Uruguaiana | Uruguaiana |
| Uruguay | Uruguay |
| Uruguay Montevideo FC | Uruguay Montevideo Fútbol Club |
| Uruk | Uruk |
| Urukagina | Urukagina |
| Urus | Ur |
| Urusei yatsura | Urusei Yatsura |
| Ury | Ury |
| urèthre | uretra |
| urètre | uretra |
| urée | urea |
| US Avellino | Unione Sportiva Avellino |
| US Coast Guard | Guardacostas de los Estados Unidos |
| US Grosseto FC | Unione Sportiva Grosseto Football Club |
| US Lecce | Unione Sportiva Lecce |
| US Open | Abierto de los Estados Unidos |
| US Open de golf | US Open |
| US Open de tennis | Abierto de los Estados Unidos |
| US Palerme | Unione Sportiva Città di Palermo |
| US Pro Vercelli | Unione Sportiva Pro Vercelli Calcio |
| US Triestina | Unione Sportiva Triestina Calcio |
| usage | objeto |
| usage commun | uso corriente |
| usage de l'énergie nucléaire | usos de la energía nuclear |
| usage incompatible | conflicto de uso |
| usage particulier | uso personal |
| usage personnel | uso personal |
| usager | usuario |
| Usages de Barcelone | Usatges de Barcelona |
| Usagi Yojimbo | Usagi Yojimbo |
| usagé | usado |
| USB | Conductor Universal en Serie |
| Uscio | Puerta |
| Usedom | Usedom |
| user | gastar |
| User Datagram Protocol | User Datagram Protocol |
| user de | emplear |
| User de magie | Magia |
| user de représailles | vengarse |
| user de représailles envers | tomar represalias |
| User identifier | UID |
| User Mode Linux | User Mode Linux |
| user parcimonieusement | conservar |
| user à mort | matarse trabajando |
