| Abbreviation | Definition |
|---|---|
| NHMA | National Hispanic Medical Association |
| nhms | New Hampshire Medical Society |
| NHPA | New Hampshire Police Association |
| NHPA | New Hampshire Psychological Association |
| NHPCA | National Hospice And Palliative Care Association |
| NHRA | National Heavy Rain Association |
| NHRA | National Hot Rodders Association |
| NIA | National Insulation Association |
| NIA | Nigerian Institute of Architects |
| NIAM | National Insurance Association of Malaysia |
| NIB | National Information Board |
| NICE | Northern Institute for Continuing Education |
| NICET | National Institute for Certification in Engineering Technologies |
| NICET | National Institute for Certification in Enginnering Technologies |
| NIDA | National Institute of Development Administration |
| NIDR | National Institute of Dental Research |
| NIE | National Institute of Electronics |
| NIFE | National Institute of Fire Safety Engineering |
| NIFE | National Institute of Fire & Safety Engineering |
| NIGA | National Indian Gaming Association |