| NM&SA | National Moving & Storage Association 
| Others |
| NMSA | National Marine Sanctuaries Act
| Others |
| NMSA | National Maritime Safety Association
| Others |
| NMSA | National Maritime Safety Authority
| Others |
| NMSA | National Middle School Association
| Others |
| NMSA | National Mortgage Servicing Association
| Others |
| NMSA | National Municipal Stormwater Alliance
| Others |
| NMSA | Naturopathic Medical Student Association
| Others |
| NMSA | Naturopathic Medicine Student Association
| Others |
| NMSA | Neal Math and Science Academy
| Others |
| NMSA | Nevada Military Support Alliance
| Others |
| NMSA | New Mexico School for the Arts
| Others |
| NMSA | New Mexico Statutes Annotated
| Others |
| NMSA | News Music Search Archive
| Others |
| NMSA | North Atlantic Treaty Organization (NATO) Mutual Support Act
| Others |
| NMSA | Northern Michigan Soccer Alliance
| Others |