| Acronym | Definition |
|---|
| AMSA | American Moving and Storage Association |
| AMSA | Australian Maritime Safety Authority |
| AMSA | American Medical Student Association |
| AMSA | Association of Metropolitan Sewerage Agencies |
| AMSA | Australian Marine Sciences Association |
| AMSA | Australian Medical Students Association |
| AMSA | American Meat Science Association |
| AMSA | Austin MotoSports Association (Texas) |
| AMSA | Army Medical Surveillance Activity |
| AMSA | Advanced Manned Strategic Aircraft |
| AMSA | Advanced Math and Science Academy (Marlborough, MA charter school) |
| AMSA | Area Maintenance Support Activity (US Army) |
| AMSA | American Medallic Sculpture Association |
| AMSA | Autoridad para el Manejo Sustentable de la Cuenca y del Lago de Amatitlán (Guatemala) |
| AMSA | Army Maintenance Support Activity |
| AMSA | Ahmadiyya Muslim Student Association |
| AMSA | Armored Motor Services of America |
| AMSA | Antimicrobial Specialists and Associates, Inc. |
| AMSA | Alberta Metallic Silhouette Association |
| AMSA | Assateague Mobile Sportfishermen's Association |
| AMSA | Allied Military Security Agency |
| AMSA | Al-Azhar Medical Student Association (Cairo, Egypt) |
| AMSA | Army Materiel Support Activity |
| AMSA | Amicale de Moto et Scooter Anciens (French: Friendly Motorcycle and Scooter Veterans) |