| Acronym | Definition |
|---|
| WHA | World Hockey Association (merged with the National Hockey League in 1970s) |
| WHA | World Health Assembly |
| WHA | World Heritage Academy (travel agency; Turkey) |
| WHA | Web Hosted Acrobat |
| WHA | World Headache Alliance |
| WHA | Western Hemisphere Affairs (US Department of State) |
| WHA | Worcester Housing Authority (Worcester, MA) |
| WHA | Wilmington Housing Authority (Delaware) |
| WHA | Western Health Advantage |
| WHA | World Health Academy (Switzerland) |
| WHA | Tungsten Heavy Alloy (alloys used in weapons production, especially as penetrators) |
| WHA | Wildlife Habitat Area |
| WHA | Wyoming Hospital Association |
| WHA | World Heroes Anthology (gaming) |
| WHA | Whole-House Automation |
| WHA | Wiring Harness Assembly |
| WHA | Waterloo Housing Association (UK) |
| WHA | Wickenburg Healthcare Alliance (Arizona) |
| WHA | Water Hammer Arrestor (plumbing) |
| WHA | Women's Hospitals Australia |
| WHA | Western Hardwood Association |
| WHA | Walkaloosa Horse Association |
| WHA | Wilson, Hewitt & Associates, Inc (Haverford, Pennsylvania) |
| WHA | Western Hockey Association |
| WHA | Weapons Holding Area |
| WHA | Windsor Housing Authority |
| WHA | Women's Health and Cancer Rights Act of 1998 |