| Abbreviation | Definition |
|---|---|
| WMMD | Wilson Metal Matrix Distance |
| WMMP | White Mountain Motorsports Park |
| WMMS | Water Mountain Martial Society |
| WMOA | West Michigan Official's Association |
| WMOC | World Masters Orienteering Championship |
| WMOG | West Midlands Organised Gyms |
| WMOS | West Midlands Organised Sports |
| WMPC | West Midlands Prokart Challenge |
| WMQ | White Mountain Quest |
| WMR | White Mountains Regional |
| WMRA | Washington Midget Racing Association |
| WMRC | Westwood Motorcycle Racing Club |
| WMRC | White Mountain Road Club |
| WMRL | White Mountain Race League |
| WMRRA | Washington Motorcycle Road Racing Association |
| WMRT | World Mountain Running Trophy |
| WMS | Western Motorsports |
| WMSA | Western Missouri Shooters Alliance |
| WMSC | Wisconsin Masters Swim Committee |
| WMSL | West Michigan Swim League |