| Acronym | Definition |
|---|
| NMSA | National Middle School Association |
| NMSA | Naturopathic Medical Student Association (various organizations) |
| NMSA | News Music Search Archive (SouthernMedia) |
| NMSA | New Mexico Statutes Annotated |
| NMSA | National Meteorological Services Agency |
| NMSA | New Mexico School for the Arts (Santa Fe, NM) |
| NMSA | National Manufacturing Skills Academy (UK) |
| NMSA | Nominal Maximum Size of Aggregate |
| NMSA | National Master Supply Arrangement |
| NMSA | New Mexico Substate Area |
| NMSA | Nonnuclear Munitions Storage Area |
| NMSA | National Movers and Storage Association |
| NMSA | Non-Metropolitan Statistical Area |
| NMSA | Norwegian Medical Students' Association (Norwegian Medical Association) |
| NMSA | North Atlantic Treaty Organization Maintenance and Supply Agency |
| NMSA | Nonmortgage Servicing Asset |