| Acronym | Definition |
|---|
| NAAI➣National Abilympic Association of India (est. 2001) |
| NAAI➣National Agency for Attracting Investment (Moldova) |
| NAAI➣North American Associated Inspectors (building inspections) |
| NAAI➣Nigerian Achievers Awards Institute (UK) |
| NAAI➣Non-Analog Antifolate Inhibitors (pharmacology) |