| Probandin | guinea pig |
| Proband | experimentee |
| Prolaktin | prolactin |
| Propadien | propadiene |
| Propanon | acetone |
| Alabandin | alabandite |
| Romandie | Romandy |
| Probezeit | probationary period |
| Profanation | desecration |
| Proletin | Philistine |
| Pronoia | pronoia |
| Propanol | propanol |
| Prophetin | prophet |
| Propin | propyne |
| Profundal | profundal zone |
| Prolin | proline |
| Propan | propane |
| Prosodie | prosody |
| Protein | protein |
| proaktiv | proactive |