| Unbreakable | Unbreakable (album, Scorpions) | Unbreakable Kimmy Schmidt |
| Unbroken | UNC | UNCAF |
| Uncanny | Uncanny valley | Uncaria tomentosa |
| Uncas | UNCAT | UNCCD |
| Unce | Uncharted (film) | Uncheck |
| Uncia | Uncia uncia | Unciála |
| Unciály | Uncinula necator | Uncle Anesthesia |
| Uncle Dysfunktional | Uncle Josh at the Moving Picture Show | Uncle Josh in a Spooky Hotel |
| Uncle Josh's Nightmare | Uncle Meat | Uncle Meat (film) |
| Uncle Tom's Cabin (film, 1903, Lubin) | Uncle Tom's Cabin (film, 1903, Porter) | Uncle Tupelo |
| Unclean | UNCLOS | Uncompahgre Peak |
| Uncompahgre Plateau | Unconditionally | Unconditionally Guaranteed |
| Unconscious Power | Uncoupled | UNCTAD |
| Uncut | Uncut (časopis) | Uncut (hudební skupina) |
| Uncut (skupina) | Uncut Femmes | Uncyclopedia |
| Und | Und der Himmel steht still | Undangs |
| Undaria pinnatifida | Undókóen (Mijazaki) | Undead |
| Undeb Bedyddwyr Cymru | Undeciliarda | Undecilion |
| Undecima | Undecima (hudba) | Undecimový akord |
| Undecylkarboxylová kyselina | Undekan | Undekanol |
| Under a Billion Suns | Under a Raging Moon (album) | Under Armour |
| Under Cöver | Under Construction | Under Cover |
| Under Feet Like Ours | Under Jolly Roger | Under My Skin |
| Under My Skin (album, Avril Lavigne) | Under One Roof | Under Pressure |
| Under Siege | Under the Bridge | Under The Bridge |
| Under the Covers, Vol. 1 | Under the Dome (seriál) | Under the Grey Banner |
| Under The Grey Banner | Under the Influence | Under the Influence (album) |
| Under the Influence (album, Status Quo) | Under the Radar Over the Top | Under The Radar Over The Top |
| Under the Red Sky | Under Wraps | Underberg |
| Underclass Hero | Underclass Hero (album) | Undercolors of Benetton |
| Undercover | Undercover (album) | Undercover Burns |
| Undercovers (seriál) | Undercroft | Undercroft (hudební skupina) |
| Underground | Underground (rozcestník) | Underground dance |
| Underground Kingz | Underground v Nové Vísce | Underground v Rychnově |
| Underhill | Underhillová | Underlife |
| Underneath the Tree | Underoath | Understudy |
| Understudy (Smash) | Undertaker | Undertale |
| Underwood | Underwood & Underwood | Underwood and Underwood |
| Underworld | Underworld (film) | Underworld (hudební skupina) |
| Underworld (skupina) | Underwriters Laboratories | Underwurlde |
| UNDI | Undina | Undina (Čajkovskij) |
| Undina (planetka) | Undine | Undinizmus |
| Undis Blikken | Undis Blikkenová | Undisputed Attitude |
| UNDOF | UNDP | Undrentide |
| Undressing Extraordinary | Undulace | Undulatus |
| Undulózní zhášení | Undulující membrána | Une bataille dans le vieux Stockholm |
| Une bonne farce avec ma tête | Une chute de cinq étages | Une demoiselle en loterie |
| Une espérance nouvelle pour le Liban | Une femme coquette | Une femme est une femme |
| Une femme fidèle | Une histoire simple | Une indigestion |
| Une jeune fille qui va bien | Une nouvelle vie | Une nuit blanche |
| Une nuit terrible | Une partie de cartes | Une place pour moi |
| Une robe d'été | Une robe noire pour un tueur | UnEarthEd |
| Unearthed | Unearthed (album, E.S. Posthumus) | Unešić |
| UNECE | UNEF | UNEF I |
| UNEF II | Unenlagia | Unenlagiidae |
| Unenlagiinae | UNEP | Unerázka |
| UNESCO | Unesco | UNESCO v Česku |
| UNESCO v ČR | Unescoceratops | Unescoceratops koppelhusae |
| UNEX | UNEX Uničov | Unexpand |
| Unfaithful | UNFCCC | Unfezant |
| UNFICYP | Unfinished Business | Unforgotten |
| UNFPA | Ung | Ungar |
| Ungaran | Ungaretti | Ungarisch Brod |
| Ungarisch Hradisch | Ungarisch Ostra | Ungarisch-Deutsche Partei der Sozialdemokraten |
| Ungaro | Ungarschitz | Ungava |
| Ungava Bay | Ungavský poloostrov | Ungavský záliv |
| UNGCI | Ungdomshuset | Ungelt |
| Unger | Ungerův dům | Ungerberg (Šluknovská pahorkatina) |
| Ungern von Sternberg | UNGG | Ungheni |
| Ungmennafélagið Fjölnir | Ungnad von Weissenwolf | Ungnad-Weißenwolfové |
| Ungnadův mlýn | Ungnadové von Weissenwolff | Ungnadové z Weissenwolffu |
| Ungod | Ungod (album, Morgoth) | Ungod (hudební skupina) |
| Ungoliant | Unguenta | Unguja |
| Ungulata | Ungulina fuliginosa | Ungur |
| Ungvár | Unhalfbricking | UNHCR |
| Unheilig | Unhošť | Unhošť (okres Kladno) |
| Unhošť (zámek) | Unholy | Unholy Cross |
| UNHRC | Uni | Uni Bremen |
| Uni Craiova | UNI HOBBY | Uni Jena |
| Unia | Unia Oświęcim | UNIAN |
| Unian | Uniat | Uniaté |
| Uniatismus | Uniatství | Uničov |
| Uničov (část obce) | Uničov (nádraží) | Uničov (okres Olomouc) |
| União de Coimbra | União de Leiria | União dos Escoteiros do Brasil |
| União Leiria | Unión de Santa Fe | Unión Española |
| Unión Estepona CF | Unión Tangerina | Unibail-Rodamco |
| Unibon Nový Jičín | Unibrejk | Unica |
| Unicaja Malaga | Unicaja Málaga | Unicast |
| UNICEF | Unicef | UNICEF Open |
| UNICEF Open 2009 - ženy | UNICEF Open 2009 - muži | UNICEF Open 2010 - ženy |
| UNICEF Open 2010 - muži | UNICEF Open 2010 – ženy | UNICEF Open 2010 – muži |
| UNICEF Open 2011 - ženy | UNICEF Open 2011 - muži | UNICEF Open 2011 – ženy |
| UNICEF Open 2011 – muži | UNICEF Open 2012 - ženy | UNICEF Open 2012 - muži |
| UNICEF Open 2012 – ženy | UNICEF Open 2012 – muži | UNICEF Open 2013 - ženy |
| UNICEF Open 2013 - muži | Unicela | Unichess |
| Unicode | UNICODE | Unicode Systems |
| UNICODE SYSTEMS | Unicorn | Unicorn (album, Tyrannosaurus Rex) |
| Unicorn College | Unicorn Systems | Unicorn University |
| Unicorn Vysoká škola | UniCredit Bank | UniCredit Bank ČR |
| UniCredit Bank Czech Republic | UniCredit Bank Czech Republic and Slovakia | UniCredit Czech Open |
