HWSA
| Acronym | Definition |
|---|---|
| HWSA | Heads of Workplace Safety Authorities (New South Wales, Australia) |
| HWSA | Homeschool World Series Association (est. 2000) |
| HWSA | Hazardous Waste Storage Area |
| HWSA | Houston Women's Soccer Association |
| HWSA | Hazardous Waste Services Association |
| HWSA | Hickory Willow Swim Association |