TWSA
| Acronym | Definition |
|---|---|
| TWSA | Transparent Watercolor Society of America (Illinois, USA) |
| TWSA | Taiwanese Student Association (various locations) |
| TWSA | Tuckaseigee Water and Sewer Authority (Sylva, NC) |
| TWSA | Treated Waste Storage Area (environmental restoration) |
| TWSA | That's What She Asked |
| TWSA | Texas Water Safety Act |
| TWSA | Two-Wire Spiral Antenna |