| Protonenakzeptor | proton acceptor |
| Protonendonator | proton donor |
| Photorezeptor | photoreceptor |
| protoplanetar | protoplanetary |
| Protektor | protector |
| Protonenblocker | proton-pump inhibitor |
| Protonenmasse | proton mass |
| Prominenter | star celebrity |
| Prospektor | prospector |
| Protoneneinfang | proton capture |
| Protoplanet | protoplanet |
| Projektor | projector |
| Protonentherapie | proton therapy |
| Photometeor | photometeor |
| Photonensegel | photon sail |
| Photonentorpedo | photon torpedo |
| Sonnenanbeter | sun worshipper |
| Götzenanbeter | idolater |
| Rezeptor | receptor |
| Brutreaktor | fast breeder fast breeder reactor |