| Unionen för fransk demokrati | Union pour la Démocratie Française |
| Unionen för nationernas Europa | Unie voor een Europa van Nationale Staten |
| Unionsflagga | Union Jack |
| Unionsmedborgarskapet | Burgerschap van de Europese Unie |
| Unionsterritorium | Unieterritorium |
| unisex- | uniseks |
| Unisys | Unisys |
| UNITA | UNITA |
| Unitarism | Unitarisme |
| United Airlines | United Airlines |
| United Federation of Planets | Verenigde Federatie van Planeten |
| United Fruit Company | United Fruit Company |
| United Methodist Church | Methodisten |
| United Nations Emergency Force | UNEF I |
| United Nations Environment Programme | United Nations Environment Programme |
| United Nations Framework Convention on Climate Change | Klimaatverdrag |
| United Nations Mission in Kosovo | UNMIK |
| United Party | Verenigde Party |
| United States Agency for International Development | United States Agency for International Development |
| United States Air Force Academy | United States Air Force Academy |
| United States Army | United States Army |
| United States Census Bureau | United States Census Bureau |
| United States Military Academy | West Point |
| United States Soccer Federation | United States Soccer Federation |
| UNIVAC | UNIVAC |
| Univers | Univers |
| Universal Binary | Universal Binary |
| Universal Media Disc | Universal Media Disc |
| Universal Product Code | Universal Product Code |
| Universal Soldier | Universal Soldier |
| Universal Studios | Universal Studios |
| universal- | algemeen |
| Universala Esperanto-Asocio | Universala Esperanto-Asocio |
| Universale Maschinenpistole | HK UMP |
| Universalia | Universalia |
| Universaliestriden | Universaliënstrijd |
| universalmedel | wondermiddel |
