| Propylon | propyleum |
| Propylen | propylene |
| Prokyon | Procyon |
| Propanon | acetone |
| Propanol | propanol |
| Propfan | propfan |
| Propin | propyne |
| Prostylos | prostyle |
| Prolin | proline |
| Prolog | prologue prolog |
| Propan | propane |
| Propen | propene |
| Propolis | propolis |
| Proton | proton |
| Aerophon | aerophone |
| Tropaion | tropaion |
| Pylon | pylon toddler traffic cone |
| Proletin | Philistine |
| Pronaos | pronaos |
| Pronghorn | pronghorn |