| Acronym | Definition |
|---|
| ACHA | American Collegiate Hockey Association |
| ACHA | American College Health Association |
| ACHA | American College of Healthcare Architects |
| ACHA | Agency for Healthcare Administration (Florida) |
| ACHA | Aboriginal Cultural Heritage Act (Australia) |
| ACHA | Association for Communal Harmony in Asia |
| ACHA | Applied and Computational Harmonic Analysis (mathematical journal) |
| ACHA | American Catholic Historical Association (Washington, DC) |
| ACHA | Air-Conduction Hearing Aid (device) |
| ACHA | Allegheny County Housing Authority (Pittsburgh, PA) |
| ACHA | American College of Hospital Administrators |
| ACHA | African Canadian Heritage Association (Toronto, Ontario, Canada) |
| ACHA | Australian Community Health Association |
| ACHA | Adelaide Community Health Alliance (Australia) |
| ACHA | Associate Commissioner for Health Affairs |