| Abbreviation | Definition |
|---|---|
| WNNA | Wynnewood North Neighborhood Association |
| WNPA | Western National Parks Association |
| WNPF | Washington's National Park Fund |
| WNPO | Workshop for Non- Profit Organizations |
| WNSF | Women's Network for a Sustainable Future |
| WNVS | West Nile Virus Society |
| WNYIL | Western New York Independent Living |
| WNYPC | Western New York Peace Center |
| WO | World Orphans |
| WODA | World Organisation of Dredging Associations |
| WOFM | Word Of Faith Missions |
| WOHI | World of Hope International |
| WOHS | Windermere Oral History Society |
| WOLA | Washington Office on Latin America |
| WONM | World Organization of Natural Medicine |
| WONMF | World Organization of Natural Medicine Foundation |
| WONMP | World Organization of Natural Medicine Practitioners |
| WOOHP | World Orginization Of Human Protection |
| WOOM | Wives Of Older Men |
| WOP | Walk On Project |