| udvælge | choose |
| udyr | brute |
| Udødelige parti | Immortal game |
| Udøvende magt | Executive |
| UEA | World Esperanto Association |
| UEFA | UEFA |
| UEFA Champions League | UEFA Champions League |
| UEFA Cup | UEFA Cup |
| UEFA Intertoto Cup | UEFA Intertoto Cup |
| UEFA Super Cup | UEFA Super Cup |
| uegennyttig | altruistic |
| Uendelig | Infinity |
| uerhørt | unheard-of |
| Uetersen | Uetersen |
| uf | ew |
| Uffe den Spage | Offa of Angel |
| Ufo | Unidentified flying object |
| uformel forhandling | informal negotiation |
| uforskammet | rude |
| uforstyrret | unperturbed |
| uforudsigbar | capricious |
| ufødt | unborn |
| Uganda | Uganda |
| uge | week |
| Ugedage | Days of the week |
| ugift | unmarried |
| ugle | owl |
| Ugle-ordenen | Owl |
| Ugler | Owl |
| Uglesvaler | Owlet-nightjar |
| ugli | ugli |
| Ugly Betty | Ugly Betty |
| uheld | accident |
| uheldig | unfortunate |
| uheldigvis | unfortunately |
| UHT-behandling | Ultra-high-temperature processing |
| uhyggelig | gruesome |
| uhøflig | rude |
| uhøjtidelig | unpretentious |
| uhørt | unheard-of |
| UIC | International Union of Railways |
| uidentificeret | unidentified |
| Uighur | Uyghur people |
| uinteresseret | uninterested |
| UK Singles Chart | UK Singles Chart |
| uklarhed | turbidity |
| Ukonventionel olie | Non-conventional oil |
| Ukraine | Ukraine |
| Ukrainsk | Ukrainian |
| ukrudt | weed |
| Ukønnet formering | Asexual reproduction |
| Ulaanbaatar | Ulaanbaatar |
| Ulan Bator | Ulan Bator |
| Ulcinj | Ulcinj |
| uld | wool |
| Ulfborg-Vemb Kommune | Ulfborg-Vemb |
| Uli Hoeness | Uli Hoeneß |
| ulig | different |
| Ulighed | Inequality |
| Uljanovsk | Ulyanovsk |
| ulk | sculpin |
| Ulkefisk | Scorpaeniformes |
| Ull | Ullr |
| Ulla | Ulla |
| Ullensaker | Ullensaker |
| Ullensvang | Ullensvang |
| Ullern | Ullern |
| Ullerslev Kommune | Ullerslev municipality |
| Ullevi | Ullevi |
| Ullevål universitetssygehus | Ullevål University Hospital |
| Ulm | Ulm |
| Ulrich Roth | Ulrich Roth |
| Ulrich Zwingli | Huldrych Zwingli |
| Ulrik | Ulric |
| Ulrik le Fevre | Ulrik le Fevre |
| Ulrike Meinhof | Ulrike Meinhof |
| Ulrikka | Ulrica |
| Ulrikke | Ulrica |
| Ulsan | Ulsan |
| Ulstein | Ulstein |
| Ulster | Ulster |
| ultimatum | ultimatum |
| Ultimatumspillet | Ultimatum game |
| Ultralet fly | Ultralight aviation |
| Ultralyd | Ultrasound |
| Ultraperiferisk region | Special member state territories and the European Union |
| Ultras | Ultras |
| Ultraviolet lys | Ultraviolet |
| ultraviolet stråling | ultraviolet radiation |
| Uluru | Uluru |
| Uluru-Kata Tjuta National Parken | Uluru-Kata Tjuta National Park |
| ulv | wolf |
| ulve | wolf |
| Ulvefod-familien | Lycopodiaceae |
| Ulvefod-klassen | Lycopodiopsida |
| Ulvekvint | Wolf interval |
| Ulven | Lupus |
| Ulverytterne | Wolfrider |
| Ulveskansen | Wolfsschanze |
| Ulvik | Ulvik |
| ulvinde | she-wolf |
| Ulysses | Ulysses |
| Ulysses S. Grant | Ulysses S. Grant |
| Uma Thurman | Uma Thurman |
| Umage | Function |
| umagen værd | worth one's while |
| Umar ibn al-Khattab | Umar |
| Umberto Boccioni | Umberto Boccioni |
| Umberto Eco | Umberto Eco |
| Umberto Giordano | Umberto Giordano |
| Umbria | Umbria |
| Umbriel | Umbriel |
| Umeå | Umeå |
| Umeå Universitet | Umeå University |
| UML | Unified Modeling Language |
| Umm Qasr | Umm Qasr |
| Ummayyaderne | Umayyad |
| UMP | Union for a Popular Movement |
| umulig at vinde | unwinnable |
| Un giorno di regno | Un giorno di regno |
| UN Peacemaker | UN Peacemaker |
| Unai Etxebarria | Unai Etxebarria |
| Unai Osa | Unai Osa |
| unaturlig | unnatural |
| Uncial | Uncial script |
| Uncle Sam | Uncle Sam |
| Uncyclopedia | Uncyclopedia |
| under kniven | under the knife |
| Under Korset stod med Smerte | Stabat Mater |
| Underarm | Lower-arm |
| underernæring | malnutrition |
| undergang | undoing |
| Underground | Underground culture |
| Undergrundsbane | Rapid transit |
| undergrundstog | underground train |
| underholdning | entertainment |
| Underhuset | Lower House |
| underjordisk bane | underground railway |
| underlig | strange |
| underpost | subentry |
| underskrift | signature |
| Understøtte | Help |
| Understøttelse | Help |
| understøttelsespunkt | fulcrum |
| undersøge | find out |
| undersøgelse af fordele for offentligheden | public benefit inquiry |
| undersøgelse af indvirkningen på miljøet | environmental impact study |
| undersøgelse af konkurrenceforhold | competitive examination |
| undertegnet | yours truly |
| undertiden | sometimes |
| undertrykkelse | repression |
| undertøj | underwear |
| underudviklede lande | less developed country |
| underudviklet | underdeveloped |
| Undervandsba*d | Submarine |
| Undervandsbåd | Submarine |
| Undervandsrugby | Underwater rugby |
| underverden | underworld |
| undervise | teach |
| undervisning | education |
| undervurdering af landbruget | agricultural undervaluation |
| undlade | fail |
| UNDP | United Nations Development Programme |
| undskyld | sorry |
| undtagelsen bekræfter regelen | exception that proves the rule |
| undtagelsesbestemmelser | emergency law |
| undtagelsesvis | exceptionally |
| undtagen | unless |
| undulat | budgerigar |
| Undvigelseshastighed | Escape velocity |
| undvære | do without |
| UNESCO | UNESCO |
| UNFCCC | United Nations Framework Convention on Climate Change |
| UNFPA | United Nations Population Fund |
| ungarer | Hungarian |
| Ungarn | Hungary |
| Ungarns fodboldlandshold | Hungary national football team |
| ungarsk | Hungarian |
| Ungarsk Eg | Hungarian Oak |
| ungarske | Hungarian |
| Ungarske konger | List of Hungarian rulers |
| Ungarske runer | Old Hungarian script |
| Ungdomsfilm | Teen film |
| Ungdomshuset | Ungdomshuset |
| Ungdomsorganisation | Youth organization |
| unge | brat |
| unger | young |
| ungfugl | chick |
| Unghegelianerne | Young Hegelians |
| ungmo | damsel |
| Ungt Bosnien | Young Bosnia |
| UNHCR | United Nations High Commissioner for Refugees |
| UNICEF | United Nations Children's Fund |
| UNICEF Goodwill-ambassadører | List of UNICEF Goodwill Ambassadors |
| Unicode | Unicode |
| unicykel | unicycle |
| Unidad Popular | Unidad Popular |
| UNIDO | United Nations Industrial Development Organization |
