| Acronym | Definition |
|---|
| NaSSA➣Noradrenergic and Specific Serotonergic Antidepressant |
| NaSSA➣National Secretariat for Social Action (Catholic Bishops' Conference of the Philippines) |
| NaSSA➣Negro American Space Society of Astronauts (from short film entitled 'The Old Negro Space Program') |
| NaSSA➣North American Shetland Sheepbreeders Association |
| NaSSA➣National Association of Shooting Sports Athletes (Richardson, TX) |
| NaSSA➣New Anglican Schools Sports Association (Australia) |
| NaSSA➣National Association of Schools of Social Administration (est. 1936) |
| NaSSA➣North America Stone Skipping Association |