| Protonendonator | proton donor |
| Protonenakzeptor | proton acceptor |
| Elektronendonator | electron donor |
| Protoneneinfang | proton capture |
| Protonenblocker | proton-pump inhibitor |
| Protonenmasse | proton mass |
| Prominenter | star celebrity |
| protoplanetar | protoplanetary |
| Protektor | protector |
| Protektorat | protectorate |
| Protonentherapie | proton therapy |
| Photorezeptor | photoreceptor |
| Photonentorpedo | photon torpedo |
| Phonendoskop | phonendoscope |
| Prätendent | pretender |
| Resonator | resonator |
| Koordinator | coordinator |
| Präsentator | presenter |
| Ozongenerator | ozone generator |
| Rohrventilator | tube fan |