NAHSA
| Acronym | Definition |
|---|---|
| NAHSA | North American Horticultural Supply Association |
| NAHSA | Nijmegen Area High School Array (research project; Netherlands) |
| NAHSA | National Association of Holmes Scholars Alumni (Bronx, NY) |
| NAHSA | National Association for Hearing and Speech Action (consumer affiliate; American Speech-Language-Hearing Association; Rockville, MD) |
| NAHSA | Nebraska Association of Homes and Services for the Aging |
| NAHSA | North American Hair Sheep Association (Sterling City, Texas) |