| Abbreviation | Definition |
|---|---|
| NRA | National Republican Army |
| NRA | National Rifle Association |
| NRA | No Reasonable Assurance |
| NRA | Not Responsible for Anything |
| NRAD | Naval Research and Development |
| NRB | Naval Requirements Board |
| NRBL | National Reconnaissance Battle Lab |
| NRC | Naval Recruiting Center |
| NRC | Non-Unit-related Cargo |
| NRCHB | Naval Reserve Cargo Handling Battalion |
| NRCHF | Naval Reserve Cargo Handling Force |
| NRCHTB | Naval Reserve Cargo Handling Training Battalion |
| NRCT | Naval Reserve Center, Tuscaloosa |
| NRD | Naval Reserve District |
| NRDC | Naval Research and Development Command |
| NRDEC | Natick RD & E Center |
| NRDEC | Natick Research, Development, & Engineering Center |
| NRE | No Religion Expressed |
| NRE | Non- Recurring Effort |
| NRF | National Response Framework |