| Unterling | underling |
| Untergang | downfall sinking decline |
| Interlingue | Interlingue |
| Peterling | parsley |
| Sterling | sterling |
| Engerling | grubworm |
| Unterlizenz | sublicense |
| Untermenge | subset |
| Unterton | subharmonic |
| Unterzug | girder |
| untertan | subject |
| Untertan | subject |
| Unterlage | base pad underlay document paper root-stock |
| Unterlauf | lower reaches |
| Unterleib | abdomen alvus |
| Unterlippe | lower lip |
| Untermenü | submenu |
| unterliegen | to be beaten to be subject to |
| untertänig | subservient |
| Interlingua | Interlingua |