| Abbreviation | Definition |
|---|---|
| NUPW | National Union of Plantation Workers |
| NUPW | National Union of Public Workers |
| NUR | National Union of Railwaymen |
| NURSU | National University of Rwanda Students Union |
| NURTW | National Union of Road Transport Workers |
| NURTW | National Union of Road Transport Works |
| NURTW | Nigeria Union of Road Transport Workers |
| NUS | National Union of Seamen |
| NUSP | National Union of Students of the Philippines |
| NUSS | National Union of Syrian Students |
| NUSU | Nipissing University Student Union |
| NUSW | National Union of Sahrawi Women |
| NUSY | National Union of Sudanese Youth |
| NUT | National Union of Teachers |
| NUT | Nigerian Union of Teachers |
| NUTE | National Union of Telecommunications Employees |
| NUTP | National Union Of The Teaching Profession |
| NUVB | National Union of Vehicle Builders |
| NUVW | National Union of Vehicle Workers |
| NUW | National Union of Workers |