| 1 | Latin | profectus | advance, progress, effect, increase, growth,... |
| 2 | Latin | proficiscor | I set out, depart, leave |
| 3 | Latin | proficio | I advance, make progress, make headway; I... |
| 4 | Latin | faciō | — |
| 5 | Latin | -torium | nominative neuter singular of -tōrius; accusative... |
| 6 | Latin | -tōrius | — |
| 7 | Latin | -tor | -er |
| 8 | Proto-Italic | -tōr | — |
| 9 | Proto-Indo-European | -tōr | Derives agent nouns from verbs, denoting someone... |
| 10 | Proto-Indo-European | -tor-s | — |