| Abbreviation | Definition |
|---|---|
| WSPA | Washington Science Policy Alliance |
| WSPA | World Society for the Protection of Animals |
| WSPA-USA | World Society for the Protection of Animals - United States of America |
| WSPB | World Society for the Preservation of Birds |
| WSPG | White Sands Pioneer Group |
| WSPGA | Wildflower Seed and Plant Growers Association, Inc. |
| WSPJ | We Stand for Peace and Justice |
| WSRM | Water Street Rescue Mission |
| WSSG | West Syndrome Support Group |
| WSSH | Wonderland Samoyed Safe Haven |
| WSSI | Women's Social Service for Israel |
| WSSOT | West of Scotland School Orchestra Trust |
| WSTA | Wall Street Technology Association |
| WSUC | Western Society For The Upliftment Of Children |
| WSWS | Western Society of Weed Science |
| WT | Wildlife Trust |
| WTA | Washington Tour on Advocacy |
| WTA | Wildlife Trust Alliance |
| WTA | World Transhumanist Association |
| WTAF | Wisconsin Trust Account Foundation |