| Abbreviation | Definition |
|---|---|
| WYLC | Wellesley Youth Lacrosse Club |
| WYM | Wilmington Y Masters Swim Team |
| WYOC | Wing Your Own Commander |
| WYR | Wilmington Youth Rowing |
| WYR | Wooden Yacht Racing |
| WYRA | Wilmington Youth Rowing Association |
| WYRA | Wooden Yacht Racing Association |
| WYRD | West Yellowhead Roller Derby |
| WYS | Wakefield Youth Skating |
| WYS | Watertown Youth Soccer |
| WYS | Westchester Youth Soccer |
| WYS | Westfield Youth Sports |
| WYS | Westlake Youth Soccer |
| WYS | Westwood Youth Soccer |
| WYS | Winchester Youth Soccer |
| WYS | Winthrop Youth Soccer |
| WYS | Woburn Youth Soccer |
| WYS | Woodford Youth Soccer |
| WYSA | Wakefield Youth Skating Association |
| WYSA | Warner Youth Sports Association |