| und zwar | namely |
| Ungwar | Uzhhorod |
| und ob | you bet |
| und so | all that jazz |
| und wie! | and how |
| und/oder | and/or |
| undenkbar | unthinkable |
| Undecan | undecane |
| undankbar | ungrateful |
| wunderbar | miraculous wonderful marvellous |
| obzwar | although |
| zwar | certainly indeed actually namely |
| Hundenarr | cynophile |
| Hundshai | school shark |
| Rundweg | loop |
| rundweg | outright |
| Sunda | Sundaland |
| Undercut | undercut |
| Zünder | detonator |
| Zunder | tinder |