| 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) |