| Abbreviation | Definition |
|---|---|
| NUT | Nuclear Untrustworthy Taliban |
| NVC | National Visa Center |
| NVD | National Vulnerability Database |
| NVL | NIST Virtual Library |
| NWC | National War College |
| NWCC | National Water and Climate Center |
| NWCP | Notice of Withholding of Contract Payments |
| NWI | National Wetlands Inventory |
| NWJ | Negotiating With the Japanese |
| NWO | Omaha District, U. S. Army Corps of Engineers |
| NWPO | Nuclear Waste Project Office |
| NWQ | National Water Quality database |
| NWQ | NorthWest Quadrant |
| NWR | National Wildlife Refuge |
| NWR | Northwest Region |
| NWRC | National Wetlands Research Center |
| NWRM | Nuclear Weapons Related Materiel |
| NWRPO | Nuclear Waste Repository Project Office |
| NWSRB | National Water Supply Regulatory Board |
| NWTC | National Wind Technology Center |