| Ultrabithorax | Ultrabithorax |
| ultraconservative | réactionnaire |
| UltraEdit | UltraEdit |
| ultrafilter | ultrafiltre |
| Ultrafiltration | Ultrafiltration |
| Ultraist | Ultra |
| Ultraist movement | Ultraïsme |
| Ultralarge | Le plus grand |
| Ultraliberalism | Ultra-libéralisme |
| Ultralight aviation | Ultra-léger motorisé |
| ultramarine | outremer |
| Ultramarines | Ultramarines |
| Ultrametric space | Norme ultramétrique |
| ultranationalism | ultranationalisme |
| ultraright | extrême droitier |
| Ultras | Ultras |
| Ultrasauros | Ultrasauros |
| Ultrasaurus | Ultrasaurus |
| ultrasonic | ultrasonique |
| Ultrasonic sound | Ultrason |
| ultrasonography | échographie |
| ultrasound | ultrasons |
| ultrasound scan | échographie |
| ultraviolet | ultraviolet |
| Ultraviolet astronomy | Astronomie en ultraviolet |
| Ultraviolet background | Fond ultraviolet |
| Ultraviolet catastrophe | Catastrophe ultraviolette |
| Ultraviolet continuum | Continu ultraviolet |
| Ultraviolet detectors | Detecteur ultraviolet |
| Ultraviolet filters | Filtre ultraviolet |
| Ultraviolet index | Indice UV |
| Ultraviolet irradiation | Rayons ultraviolets |
| Ultraviolet objects | Objet ultraviolet |
| ultraviolet radiation | rayonnement ultraviolet |
| Ultraviolet surveys | Releve ultraviolet |
| Ultzama | Ultzama |
| Uluburun shipwreck | Uluburun |
| Ulugh Beg | Ulugh Beg |
| Uluru | Ayers Rock |
| Uluç Ali Reis | Uludj Ali |
| Ulva | Ulva |
| Ulva lactuca | Ulva lactuca |
| Ulvila | Ulvila |
| Ulvophyceae | Ulvophyceae |
| Ulyanovsk | Oulianovsk |
| Ulysses | Ulysse |
| Ulysses S. Grant | Ulysses Simpson Grant |
| Ulúa River | Rio Ulúa |
| Um er-Rasas | Um er-Rasas |
| Uma | Satî |
| Uma Thurman | Uma Thurman |
| Umag | Umag |
| Umag Open | Open de Croatie Umag |
| Umaglesi Liga | Championnat de Géorgie de football |
| umami | umami |
| Uman | Ouman |
| Umar | Omar ibn al-Khattab |
| Umar ibn Hafsun | Omar Ben Hafsun |
| Umar II | Umar ben Abd al-Aziz |
| Umar Tall | Oumar Tall |
| Umatilla | Umatilla |
| Umayyad | Omeyyades |
| Umayyad conquest of North Africa | Conquête musulmane du Maghreb |
| Umayyad Mosque | Grande mosquée des Omeyyades |
| UMB | Mémoire réservée |
| Umbecast | Il pèse |
| umbel | ombelle |
| umbellifer | ombellifère |
| umbelliferous | ombellifère |
| Umbellularia | Laurier de Californie |
| Umberto Boccioni | Umberto Boccioni |
| Umberto Caligaris | Umberto Caligaris |
| Umberto Eco | Umberto Eco |
| Umberto Giordano | Umberto Giordano |
| Umberto Nobile | Umberto Nobile |
| umbilical bandage | bandage ombilical |
| umbilical cord | cordon ombilical |
| umbilical hernia | hernie ombilicale |
| umbilicus | nombril |
| umbra | ombre |
| umbrage | ombrage |
| Umbral calculus | Calcul symbolique |
| umbrella | central |
| Umbrella Cockatoo | Cacatoès blanc |
| umbrella stand | porte-parapluies |
| umbrella term | terme générique |
| Umbrellabird | Coracine ornée |
| Umbrello UML Modeller | Umbrello UML Modeller |
| Umbri | Ombriens |
| Umbria | Ombrie |
| Umbrian | Ombrien |
| Umbrian language | Ombriens |
| Umbriel | Umbriel |
