PWSA
| Acronym | Definition |
|---|---|
| PWSA | Prader-Willi Syndrome Association |
| PWSA | Pittsburgh Water and Sewer Authority (Pittsburgh, PA) |
| PWSA | Ports and Waterways Safety Act |
| PWSA | Provincial Women's Softball Association (Ontario, Canada) |
| PWSA | Port and Waterways Safety Act of 1972 |
| PWSA | Printed Wide-Slot Antenna |