| Abbreviation | Definition |
|---|---|
| WKC | World Karate Confederation |
| WKC | World Kendo Championship |
| WKCC | Willamette Kayak and Canoe Club |
| WKD | Wilson Knock Down |
| WKF | World Kayak Federation |
| WKF | World Kickboxing Federation |
| WKF | World Kobudo Federation |
| WKF | World Kobudokan Federation |
| WKFA | Waterloo Kung Fu Academy |
| WKFA | World Kung Fu Association |
| WKFL | Western Kansas Football League |
| WKGA | World Koryo Gumdo Association |
| WKGB | Wuchia Kuoshu Governing Body |
| WKI | Wilderness Kayak Institute |
| WKIG | Wicket Keeping Inner Glove |
| WKK | White Knuckle Kingdom |
| WKK | World Kenpo Karate |
| WKKA | World-Wide Kenpo Karate Association |
| WKKF | World Kanzen Kenpo Federation |
| WKKF | World Koshiki Karatedo Federation |