| Abbreviation | Definition |
|---|---|
| WMSM | White Mountain Sports Medicine |
| WMSS | West Michigan Soaring Society |
| WMST | West Midlands Schools of Tae Kwon-Do |
| WMTC | World MuayThai Council |
| WMTF | World Monster Truck Federation |
| WMTO | World Muay Thai Organization |
| WMUP | Warmup |
| WMVL | Winnipeg Men's Volleyball League |
| WMW | Wrestling MidWest |
| WMWF | Wrestle Media Wrestling Federation |
| WMXA | Women's Motocross Association |
| WMYA | Western Michigan Yachting Association |
| WMYL | Western Maryland Youth League |
| WNA | Whitehorse Netball Association |
| WNA | World Nunchaku Association |
| WNAF | Western National Angus Futurity |
| WNAG | Wyoming-Nebraska Area Geocachers |
| WNBA | Women's National Basketball Association |
| WNBC | Westminster National Baseball Classic |
| WNBF | World Natural Bodybuilding Federation |