| Acronym | Definition |
|---|
| NIRA➣National Institute for Research Advancement (Japan) |
| NIRA➣National Intercollegiate Rodeo Association |
| NIRA➣National Insurance Recruiters Association |
| NIRA➣National Industrial Recovery Act of 1933 |
| NIRA➣National Import Racing Association |
| NIRA➣North American Industrial Representatives Association |
| NIRA➣Navy Internal Relations Activity |
| NIRA➣National Intelligence Reform Act of 2004 |
| NIRA➣National Internet Registry of Afghanistan |