| Untergang | downfall sinking decline |
| untertan | subject |
| Untertan | subject |
| Unterling | underling |
| untergärig | bottom-fermented |
| untertänig | subservient |
| Übergang | transition change(over) |
| Untergattung | subgenus |
| Untermenge | subset |
| Unterstand | cabana refuge |
| Untertanin | subject |
| Unterton | subharmonic |
| Unterzug | girder |
| Unterarm | forearm |
| Unterart | subspecies |
| Unterbau | foundation |
| Unterfangen | undertaking |
| Untergrund | bedrock (geol.) subfloor subgrade (constr., tech., geol.) subsoil substrate substratum base basis footing ground base coat (paint etc.) base material surface undercoat (paint etc.) underground |
| Unterhalt | alimony upkeep |
| Unterhaus | lower chamber lower house House of Commons |