PNAA
| Acronym | Definition |
|---|---|
| PNAA | Philippine Nurses Association of America |
| PNAA | Pacific Northwest Alpaca Association |
| PNAA | Pacific Northwest Aerospace Alliance (Seattle, WA) |
| PNAA | Piano Nazionale Alimentazione Animale (Italian: National Plan on Animal Nutrition; Minister of Health) |
| PNAA | Preconcentration Neutron Activation Analysis (nuclear chemistry) |