PAH
- Barkley Regional Airport
- National Weather Service Paducah, Kentucky
- PAH clearance
- PAH world hypothesis
- Pah Homestead
- Pah Wongso
- Pah Wraith
- Pah, Gujarat
- Pah-Ute County, Arizona Territory
- Pan-American Highway
- Para-aminohippurate
- Pawnee mythology
- Phenylalanine hydroxylase
- Photoacid
- Plataforma de Afectados por la Hipoteca
- Polish Humanitarian Action
- Polyallylamine hydrochloride
- Polyanhydrides
- Polycyclic aromatic hydrocarbon
- Primary alveolar hypoventilation
- Pulmonary arterial hypertension
- Russian Academy of Sciences