Encyclopedias, Almanacs, Transcripts, and Maps
- potassium hydroxide
- potato beetle
- potentiometer
- Potgieter, Everhardus Johannes
- Potidaea
- Potomac Heritage National Scenic Trail
- Pottawatami
- Potter, Alonzo
- Potter, Henry Codman
- Pottstown
- Pottsville
- Poulsen, Valdemar
- pound-foot
- Pourri, Mont
- Pousette-Dart, Richard
- Poverty Point National Monument
- Poverty, Health Care, Homelessness, Housing, and Employment
- Powell, Dawn
- Powell, Lake
- power brake