| Süntelbuche | Dwarf Beech |
| Sudelbuch | wastebook |
| Unterbühne | mezzanine |
| Unterbauch | lower abdomen underbelly |
| untersuchen | investigate examine |
| untersucht | probed |
| Spielbuch | gamebook |
| Zunderbüchse | tinderbox |
| Stundenbuch | Book of Hours |
| Futtersuche | foraging |
| Suppenküche | soup kitchen |
| Sündenbock | scapegoat |
| Untertauchen | immersion |
| untertauchen | submerge |
| kunterbunt | colorful |
| unterjochen | subjugate subdue |
| Unterricht | teaching instruction classes lessons |
| Unterwäsche | underwear underclothes underclothing undergarments |
| unterbrechen | interrupt disconnect disrupt cut off disturb suspend |
| Hinterbacke | buttock |