| Term | Full Form | Category |
|---|---|---|
| PWSA | Pittsburgh Water and Sewer Authority | Others |
| PWSA | Pittsburgh Water Sewer Authority | Others |
| PWSA | Prader Willi Syndrome Association | Others |
| PWSA | Prader- Willy Syndrome Association | Others |
| PWSA | Prince William Sound Adventures | Others |
| PWSA | Professional Women Singers Association | Others |
| PWSA | Program for Women and Successful Aging | Others |
| PWSA | Progressive Women's Spiritual Association | Others |
| PWSA | Provincial Women's Softball Association | Others |
| PWSA | Pueblo West Student Association | Others |