See also: Appendix:Variations of "pu"
- (organic chemistry) polyurethane
- (slang) expression used when encountering a displeasing smell; exaggerated pronunciation of pew
- (Internet slang) pickup (as in, pickup artist)
- (linguistics) prosodic unit (IU for intonation unit is preferred)
- (polyurethane): ePTFE
- Puebla (Mexican state)