| PV | Pavia |
| PVC | Poli |
| PW | prisionero de guerra |
| Pwd | Pwd |
| Pycnocline | Termoclina |
| Pycnometer | Picnómetro |
| Pydna | Pidna |
| Pye | Pia |
| Pyeongchang County | Pyeongchang |
| Pygmalion | Pigmalión |
| Pygmalion effect | Efecto Pigmalión |
| Pygmalion of Tyre | Pigmalión |
| pygmy | pigmeo |
| Pygmy Brocket | Mazama nana |
| Pygmy Hog | Sus salvanius |
| Pygmy possum | Burramyidae |
| Pygmy Rabbit | Brachylagus idahoensis |
| Pygmy rice rat | Oligoryzomys |
| Pygmy Right Whale | Neobalaenidae |
| Pygoscelis | Pygoscelis |
| Pyhäjärvi | Lago Pyhäjärvi |
| Pyin U Lwin | Pyin U Lwin |
| Pyinmana | Pyinmana |
| pyjamas | pijama |
| Pylades | Pílades |
| pylon | pilón |
| Pylons of Cádiz | Pilones de Cádiz |
| Pylos | Pilos |
| PyMOL | Pymol |
| Pyongyang | Pyongyang |
| Pyongyang Metro | Metro de Pyongyang |
| pyorrhea | piorrea |
| pyorrhoea | piorrea |
| Pyotr Bagration | Piotr Bagration |
| Pyotr Ilyich Tchaikovsky | Piotr Ilich Chaikovski |
| Pyotr Kafarov | Paladio |
| Pyotr Kapitsa | Pyotr Leonidovich Kapitsa |
| Pyotr Koshevoy | Petr Koshevoi |
| Pyotr Krasnov | Piotr Nikolaievich Krasnov |
| Pyotr Lebedev | Piotr Lebedev |
| Pyotr Nikolayevich Wrangel | Piotr Wrangel |
| Pyotr Rachkovsky | Pyotr Rachkovsky |
| Pyotr Stolypin | Pyotr Stolypin |
| pyralene | piraleno |
| pyramid | pirámide |
| Pyramid of Cestius | Pirámide Cestia |
| Pyramid of Djoser | Pirámide escalonada de Zoser |
| Pyramid of the Sun | Pirámide del Sol |
| Pyramid power | Piramidología |
| Pyramid Texts | Textos de las Pirámides |
| pyramidal | piramidal |
| Pyramidal orchid | Anacamptis pyramidalis |
| Pyramidalis muscle | Piramidal del abdomen |
| Pyramiden | Pirámide |
| Pyramidology | Piramidología |
| Pyramids of Giza | Necrópolis de Giza |
| Pyramids of Güímar | Pirámides de Güímar |
| Pyramus and Thisbe | Píramo y Tisbe |
| Pyrargyrite | Pirargirita |
| pyre | pira |
| Pyrenean Chamois | Rupicapra rupicapra |
| Pyrenean Desman | Galemys pyrenaicus |
| Pyrenean Ibex | Capra pyrenaica pyrenaica |
| Pyrenees | Pirineos |
| Pyrenees National Park | Parque Nacional de los Pirineos |
| Pyrethrin | Piretrina |
| pyretic | febril |
| Pyrex | pyrex |
| pyrexia | fiebre |
| Pyrite | Pirita |
| pyrites | pirita |
| Pyrocumulus cloud | Pyrocumulus |
| Pyrokinesis | Pirokinesis |
| Pyrolaceae | Pyrolaceae |
| pyrolysis | pirólisis |
| pyromaniac | pirómano |
| Pyroraptor | Pyroraptor |
| pyrotechnics | pirotecnia |
| Pyrotherium | Pyrotherium |
| Pyrrha | Pirra |
| Pyrrhic victory | victoria pírrica |
| Pyrrhic War | Guerras Pírricas |
| Pyrrho | Pirrón |
| Pyrrhos | Pirro de Epiro |
| Pyrrhura | Pyrrhura |
| Pyrrhus of Epirus | Pirro de Epiro |
| Pyrrole | Pirrol |
| Pyrrolizidine | Pirrolizidina |
| Pyrrolysine | Pirrolisina |
| Pyrénées-Atlantiques | Pirineos Atlánticos |
| Pyrénées-Orientales | Pirineos Orientales |
| Pythagoras | Pitágoras |
| Pythagoras of Rhegium | Pitágoras |
| Pythagorean | Pitagórico |
| Pythagorean comma | Coma |
| Pythagorean interval | Ditono |
| Pythagorean theorem | Teorema de Pitágoras |
| Pythagorean triple | Terna pitagórica |
| Pythagorean tuning | Afinación pitagórica |
| Pythia | Oráculo de Delfos |
| Pythian Games | Juegos Píticos |
| python | pitón |
| Python Programming | Python |
| Python programming language | Python |
| Python regius | Python regius |
| Python reticulatus | Python reticulatus |
| Pythonidae | Pythonidae |
