| Untermenge | subset |
| Untermenü | submenu |
| Übermenge | superset |
| Unterzeile | subheadline |
| Unterfangen | undertaking |
| Untergang | downfall sinking decline |
| Untergrenze | lower limit |
| Unterlage | base pad underlay document paper root-stock |
| Unterling | underling |
| Untermensch | subhuman |
| Unterseite | bottom underneath underpart underside subpage |
| unterlegen | inferior |
| unterwegs | on the way on the road |
| Einermenge | singleton |
| Obermenge | superset |
| Unmenge | myriad |
| Runterweg | descent |
| Unterbühne | mezzanine |
| Unterdeck | lower deck |
| Unterlagen | document |