U
| กก Ulango | English |
| ubo | locality, position |
| ufemismo | euphemism |
| ugeniko | eugenics |
| ukalipto | eucalyptus |
| Ulango | Ulango |
| Ulangisto | Ulangist |
| ulmo | elm |
| ulogi | eulogize |
| ultimato | ultimatum |
| un | one |
| uno | unit |
| unu | first |
| unizi | unify |
| unanima | unanimous |
| unso | ounce |
| ungo | nail, talon |
| uniformo | uniform |
| unika | unique |
| unio | union |
| universo | universe |
| universa | universal |
| universito | university |
| uniti | unite |
| Unita Naxos | United Nations |
| Unita Statos | United States |
| uranio | uranium |
| urbo | city |
| urbano | citizen |
| urbestro | mayor |
| urji | urge |
| urja | urgent |
| urjo | urgency |
| urino | urine |
| urini | urinate |
| urno | urn |
| urso | a bear |
| usi | use |
| utanazio | euthanasia |
| utero | uterus |
| utila | utilitarian |
| utilizi | utilize |
| utopio | Utopia |
| uzuro | usury |
| uzurpi | usurp |