| Acronym | Definition |
|---|
| NHSA➣National Head Start Association |
| NHSA➣National Human Services Assembly (Washington, DC) |
| NHSA➣National Homeland Security Agency |
| NHSA➣National Heart Savers Association |
| NHSA➣National High School Alliance (various organizations) |
| NHSA➣National Haitian Student Alliance |
| NHSA➣National Hellenic Student Association |
| NHSA➣Neighborhood Housing Service of America |
| NHSA➣National Healthcare Staffing Association |