| Acronym | Definition |
|---|
| NNBA➣National Nurses in Business Association |
| NNBA➣Navajo Nation Bar Association |
| NNBA➣Northern Nevada Bluegrass Association |
| NNBA➣National Negro Bowling Association (founded 1939; now The National Bowling Association) |
| NNBA➣Native National Basketball Association (Ontario, Canada) |
| NNBA➣National Negro Bar Association |
| NNBA➣Northwest National Bank of Arlington (Arlington, TX) |