| 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 |