| Proband | experimentee |
| Probandin | guinea pig |
| Propan | propane |
| probat | proven appropriate suitable |
| proben | rehearse |
| profan | mundane carnal profane secular |
| profund | profound |
| Armband | bracelet |
| Roland | Roland Rolland Rowland |
| Probe- | tentative |
| probe- | shakedown |
| Pronaos | pronaos |
| Propanol | propanol |
| Propanon | acetone |
| Propfan | propfan |
| Propin | propyne |
| prograd | prograde |
| Probe | rehearsal trial sample |
| Problem | problem trouble |
| Prolaps | prolapse |