| 1 | English | umpteen | API; Relatively large but unspecified in number |
| 2 | English | umpty | indefinite in number; unspecified |
| 3 | English | UMP | Initialism of uridine monophosphate |
| 4 | English | umpire | The official who presides over a tennis game sat... |
| 5 | Middle English | noumper | — |
| 6 | Old French | nonper | odd number, not even |
| 7 | Old French | per | by; equal |
| 8 | Latin | pār | — |
| 9 | Proto-Indo-European | perH- | to fly; fore, first; exchange |
| 10 | Proto-Indo-European | per- | before, in front; first; to go through |
| 11 | Proto-Indo-European | pr̥tós | passed , crossed |