WCA
- Global Methodist Church
- Marvel Comics
- W C A Boarding House
- WAGR WCA/WCE class
- Wake Christian Academy
- Warner Christian Academy
- Washington Christian Academy
- Waste collection authority
- Water Conservation Area 3
- Water cascade analysis
- Waterbury Career Academy
- WeChoice Awards
- Weakly coordinating anion
- Welsh Canoeing Association
- Welsh Cricket Association
- Wesleyan Christian Academy
- West Caribbean Airways
- West Central Area Schools
- West Coast Airlines
- WestAir Commuter Airlines
- Western Canada Airways Ltd.
- Westminster Christian Academy (Georgia)
- Westminster Christian Academy (Missouri)
- Wildwood Catholic Academy
- Williamsburg Christian Academy
- Willow Creek Academy
- Wilmington-Catalina Airline
- Windermere Cruising Association
- Wisconsin Career Academy
- Women's Camanachd Association
- Women's Caucus for Art
- Women's Caucus for Art Lifetime Achievement Award
- Women's Cricket Association
- Women's Cricket Association of India
- Work Capability Assessment
- Working Class Action
- World Chiropractic Alliance
- World Clown Association
- World Coal Association
- World Communication Awards
- World Constituent Assembly
- World Council of Arameans
- World Counter-terrorism Agency
- World Cube Association
- World Programme for the Census of Agriculture
- Worst-case circuit analysis
- Wrangell Cooperative Association
- Wyoming Contractors Association