| Acronym | Definition |
|---|
| HAA➣Home and Away (Australian TV show) |
| HAA➣Histiocytosis Association of America (Pitman, NJ) |
| HAA➣Houston Arts Alliance |
| HAA➣Harvard Alumni Association |
| HAA➣Home Acoustics Alliance (training) |
| HAA➣High Altitude Airship |
| HAA➣HIV/AIDS Administration (District of Columbia) |
| HAA➣Hellenic American Academy (Lowell, MA) |
| HAA➣Haloacetic Acid |
| HAA➣Houston Apartment Association |
| HAA➣Hospice Association of America (Washington, DC) |
| HAA➣Heavy Anti-Aircraft |
| HAA➣Height Above Airport (aviation) |
| HAA➣Herpetological Association of Africa |
| HAA➣Heterocyclic Aromatic Amine |
| HAA➣Hrvatska Akreditacijska Agencija (Slovenian: Croatian Accreditation Agency; Croatia) |
| HAA➣Home Automation Association |
| HAA➣Hispanic Agenda for Action (HHS BHPR US government) |
| HAA➣Holy Angels Academy (Buffalo, NY) |
| HAA➣Hawaii Aquaculture Association |
| HAA➣Hinsdale Adventist Academy (Hinsdale, IL) |
| HAA➣Hired Assassin Agency |
| HAA➣Hellenic Army Aviation |
| HAA➣Heat Activated Adhesive |
| HAA➣Hispanics Across America (New York, New York) |
| HAA➣Hormonally Active Agent |
| HAA➣Heavy Anti-aircraft Artillery |
| HAA➣hemoglobin-associated acetaldehyde (laboratory test indicative of heavy alcohol use) |
| HAA➣Holstein Association of America |
| HAA➣Horatio Alger Association of Distinguished Americans |
| HAA➣Haris Al Afaq (Dubai, UAE) |
| HAA➣High Activity Aircraft (military flying exercises) |
| HAA➣Heartland Alliance of America |
| HAA➣Hold At Airborne |
| HAA➣House Amendments Analysis (Texas) |
| HAA➣Humanitarian Assistance for Afghanistan |
| HAA➣High Acceleration Assist (Mode) |
| HAA➣Havyaka Association of Americas (New Jersey) |
| HAA➣Humans Against Acronyms |