| Protactinium | protactinium |
| Actinium | actinium |
| Prolaktin | prolactin |
| Prophetentum | prophethood |
| Prostatitis | prostatitis |
| Protektionist | protectionist |
| Promethium | promethium |
| Protagonist | protagonist |
| Protium | protium |
| Pollinium | pollinium |
| Patrozinium | patronage |
| Priabonium | Priabonian |
| Präsidium | presidium |
| Probandin | guinea pig |
| Profitum | professionality |
| Proletin | Philistine |
| Prophetin | prophet |
| Protektion | patronage |
| Proterozoikum | Proterozoic |
| Protestantin | Protestant |