| Proterozoikum | Proterozoic |
| Phanerozoikum | Phanerozoic |
| Proverbium | proverb |
| Paläoproterozoikum | Paleoproterozoic |
| Proteomik | proteomics |
| Präteritum | past tense Past simple preterit preterite past simple praeterite |
| Kryptozoikum | Cryptozoic |
| Mesozoikum | Mesozoic |
| Paläozoikum | Paleozoic Palaeozoic palaeozoic era paleozoic era |
| Protozoon | protozoan |
| Provisorium | makeshift |
| Promethium | promethium |
| Proprium | proper |
| Protactinium | protactinium |
| Proteom | proteome |
| Protium | protium |
| Deuteronomium | Deuteronomy |
| Kriterium | criterion |
| phanerozoisch | Phanerozoic |
| Patrozinium | patronage |