| Acronym | Definition |
|---|
| WSSA | Weed Science Society of America |
| WSSA | World Sport Stacking Association (Highlands Ranch, CO) |
| WSSA | Western Social Science Association |
| WSSA | Weapon(s) System Support Activity |
| WSSA | Washington State Soccer Association |
| WSSA | Washington State Snowmobile Association |
| WSSA | Women's Studies Student Association |
| WSSA | Wine and Spirits Shippers Association |
| WSSA | Water and Sanitation Services South Africa |
| WSSA | Wyoming State Snowmobile Association |
| WSSA | Watercolour Society of South Africa |
| WSSA | Water Supply and Sewerage Authority |
| WSSA | Washington State Society of Anesthesiologists |
| WSSA | Weavers and Spinners Society of Austin (Texas) |
| WSSA | Wyoming State Shooting Association (Lander, WY) |
| WSSA | Wyoming State Soccer Association |
| WSSA | Welsh Secondary Schools Association |
| WSSA | Washington State Securities Act |
| WSSA | White Sands Soaring Association (Alamogordo, New Mexico) |
| WSSA | Wisconsin Social Services Association |
| WSSA | West Shore Sportsmen's Association |
| WSSA | Winter School on Semantics and Applications |
| WSSA | World Sand Sculptors Association |
| WSSA | West Sound Sailing Association |
| WSSA | Western Subtropical South Atlantic |
| WSSA | Wholesale Systems Security Administration |
| WSSA | Workshop on System/Software Architectures |
| WSSA | Washington State Sheriff’s Association |
| WSSA | Web Support for Simulation and Animation |
| WSSA | Washington Self-Storage Association |
| WSSA | Web Security Services Agent |
| WSSA | Weapons Software Support Activity |
| WSSA | Whole Ship Shock Analysis |
| WSSA | Worcestershire Support Services Agency (UK) |
| WSSA | Washington Skeet Shooting Association |
| WSSA | Water-Soluble Somatic Antigen |
| WSSA | Western Stock Show Association |
| WSSA | Western State Symposium Association |
| WSSA | Water-Stable Soil Aggregate |
| WSSA | Winston-Salem Symphony Association, Inc. (North Carolina) |
| WSSA | Warrnambool Sporting Shooters Association |
| WSSA | Women and Gender Studies Student Association |
| WSSA | Wirtschaftskammer Schweiz-Süd-Afrika |