| |
|---|
  | All "U" Items |
| uakari |
| Uighur, Uigur |
| Ukraine |
| ultra- |
| UN |
| UN Environment Programme (UNEP) |
| UN Food and Agriculture Organization (FAO) |
| UN World Food Programme (WFP) |
| under- |
| under way, underway |
| UNESCO |
| unicornfish |
| uninterested, disinterested |
| Union, Federal Union, Union Army |
| United Kingdom of Great Britain and Northern Ireland, Britain, Great Britain, British Isles |
| United Nations High Commissioner for Refugees (UNHCR) |
| United States |
| Universal time, UT |
| University of California |
 | Untouchable, Untouchability |
| upon, on |
| upper |
| Upper Egypt (valley), Lower Egypt (delta) |
| upstate New York |
| upward(s) |
| URL (abbreviation for uniform resource locator, an Internet address) |
| U.S. Fish and Wildlife Service |
| U.S.S.R. (Union of Soviet Socialist Republics) |
| USGS |