| protoplanetar | protoplanetary |
| protoplanetarisch | protoplanetary |
| Protoplanet | protoplanet |
| präplanetar | pre-planetary |
| Protoplasma | protoplasm |
| proprietär | closed proprietary |
| Phytoplankton | phytoplankton |
| interplanetar | interplanetary |
| planetar | planetary |
| prämonetär | premonetary |
| phytosanitär | phytosanitary |
| Profanität | profanity |
| Protestantin | Protestant |
| Protestant | Protestant demonstrator protester |
| Protokollant | minute-taker |
| Protolyse | protolysis |
| Provokateur | provocateur |
| provokant | provocative |
| Photopapier | photographic paper |
| Photopeak | photopeak |