| uninterested | uinteresseret |
| Union | Syndikat |
| Union between Sweden and Norway | Den svensk-norske union |
| Union Centroamericana de Fútbol | Unión Centroamericana de Fútbol |
| Union Cycliste Internationale | UCI |
| Union Démocratique Bretonne | Bretonsk Demokratisk Sammenslutning |
| Union Flag | Storbritanniens flag |
| Union for a Popular Movement | UMP |
| Union Jack | Storbritanniens flag |
| Union of South Africa | Unionen Sydafrika |
| Union of Soviet Socialist Republics | Sovjetunionen |
| Union of the Comoros | Comorerne |
| Union Party | Sambandsflokkurin |
| Union Theological Seminary in the City of New York | Union Theological Seminary |
| unique | eneste |
| Unique key | Nøgle |
| Unique Master Citizen Number | Personligt identifikationsnummer |
| Uniracers | Unirally |
| Uniramia | Uniramia |
| unit | ener |
| unit vector | enhedsvektor |
| UNITA | UNITA |
| Unitarianism | Unitarisme |
| Unitarisation | Unitarisme |
| Unitarisk Kirkesamfund | Unitarisk Kirkesamfund |
| Unitary matrix | Unitær matrix |
| Unitary state | Enhedsstat |
| unite | proletarer i alle lande |
| United Airlines | United Airlines |
| United Arab Emirates | Forenede Arabiske Emirater |
| United Arab Emirates dirham | Dirham |
| United Arab Republic | Forenede Arabiske Republik |
| United Islamic Front for the Salvation of Afghanistan | Den Nordlige Alliance |
| United Kingdom | Forenede Kongerige |
| United Kingdom of Great Britain and Northern Ireland | Forenede Kongerige |
| United Kingdom of the Netherlands | Kongeriget Nederlandene |
| United Methodist Church | Metodisme |
| United Mexican States | Mexico |
| United Nations | De Forenede Nationer |
| United Nations African Union Mission in Darfur | United Nations African Union Mission in Darfur |
| United Nations Charter | De Forenede Nationers Pagt |
| United Nations Children's Fund | UNICEF |
| United Nations Day | FN-dag |
| United Nations Development Programme | UNDP |
| United Nations Environment Programme | United Nations Environment Programme |
| United Nations Framework Convention on Climate Change | UNFCCC |
| United Nations Industrial Development Organization | UNIDO |
| United Nations Office at Vienna | Vienna International Centre |
| United Nations Office on Drugs and Crime | United Nations Office on Drugs and Crime |
| United Nations Organization | Forenede Nationer |
| United Nations Population Fund | UNFPA |
| United Nations Protection Force | United Nations Protection Force |
| United Nations Relief and Rehabilitation Administration | UNRRA |
| United Republic of | Tanzania |
| United States | Amerikas Forenede Stater |
| United States Air Force | United States Air Force |
| United States Army | United States Army |
| United States Army Air Forces | Aphex Twin |
| United States Army Special Forces | United States Army Special Forces |
| United States Attorney General | Department of Justice |
| United States Cabinet | Kabinet |
| United States Capitol | Kapitol |
| United States Coast Guard | United States Coast Guard |
| United States Congress | Kongressen |
| United States Constitution | USA's forfatning |
| United States Department of Defense | Det amerikanske forsvarsdepartement |
| United States Department of Justice | Department of Justice |
| United States Department of State | Det amerikanske udenrigsministerium |
| United States dollar | Amerikanske dollar |
| United States Holocaust Memorial Museum | United States Holocaust Memorial Museum |
| United States House of Representatives | Repræsentanternes Hus |
| United States Marine Corps | United States Marine Corps |
| United States Military Academy | West Point |
| United States national basketball team | Dream Team |
| United States Navy | United States Navy |
| United States Navy SEALs | Navy SEALs |
| United States occupation of Fallujah | Slaget om Fallujah |
| United States of America | Amerikas Forenede Stater |
| United States Secretary of Defense | Det amerikanske forsvarsdepartement |
| United States Secretary of State | Udenrigsminister |
| United States Senate | Senatet |
| United States Special Operations Command | USSOCOM |
| United States Virgin Islands | Amerikanske Jomfruøer |
| Units of measurement | Måleenhed |
| Unity of the Brethren | Herrnhutiske Brødremenighed |
| Universal abit | ABIT |
| Universal asynchronous receiver transmitter | UART |
| Universal Coordinated Time | UTC |
| Universal Declaration of Linguistic Rights | Menneskerettighedserklæringen |
| Universal Media Disc | Universal Media Disc |
| Universal Plug and Play | Universal Plug and Play |
| Universal Product Code | Universal Product Code |
| Universal quantification | Alkvantor |
| Universal reconciliation | Universalisme |
| Universal Serial Bus | Universal Serial Bus |
| Universal Studios | Universal Studios |
| Universal Studios Theme Parks | Universal Studios |
| Universal Transverse Mercator coordinate system | Universal Transverse Mercator |
| universe | univers |
| Universiteit van Amsterdam | Universiteit van Amsterdam |
| Universitet | Universitet |
| university | universitet |
| University for applied sciences | Seminarium |
| University hospital | Universitetshospital |
| University of Aalborg | Aalborg Universitet |
| University of Aarhus | Aarhus Universitet |
| University of Alicante | Sprogteknologi |
| University of Cambridge | Cambridge Universitet |
| University of Chicago | University of Chicago |
| University of Copenhagen | Københavns Universitet |
| University of Greenland | Ilisimatusarfik |
| University of Hawaii | University of Hawaii |
| University of Kiel | Christian-Albrechts-Universität |
| University of Münster | Westfälische Wilhelms-Universität |
| University of Oslo | Universitetet i Oslo |
| University of Oxford | Oxford Universitet |
| University of Paris | Sorbonne |
| University of Pennsylvania | University of Pennsylvania |
| University of Southern Denmark | Syddansk Universitet |
| University of St Andrews | University of St Andrews |
| University of Sussex | Sussex Universitet |
| University of Tasmania | University of Tasmania |
| University of the Faroe Islands | Færøernes Universitet |
| University of Vienna | Wien Universitet |
| University of Washington | University of Washington |
| Universytet | Universitet |
| Unix | UNIX |
| Unix shell | Unix-skal |
| Unix time | Tid |
| Unjárga | Nesseby |
| unknown | ukendt |
| Unladen weight | Tara |
