| Unterbauch | lower abdomen underbelly |
| Unterbau | foundation |
| Untertauchen | immersion |
| untertauchen | submerge |
| Unterdruck | depression low pressure partial vacuum underpressure |
| Unterhaus | lower chamber lower house House of Commons |
| Unterlauf | lower reaches |
| Unterwäsche | underwear underclothes underclothing undergarments |
| untersucht | probed |
| unsterblich | immortal |
| Bierbauch | beer belly beer gut paunch |
| Oberbauch | epigastrium |
| unverbraucht | unconsumed |
| Unterbühne | mezzanine |
| Unterdeck | lower deck |
| Unterlagen | document |
| Unterstrich | underline |
| Untertanin | subject |
| Unterzug | girder |
| kunterbunt | colorful |