| Acronym | Definition |
|---|
| NHRR➣North Herts Road Runners (UK) |
| NHRR➣New Hope and Ivyland Rail Road |
| NHRR➣Naval Hospital Roosevelt Roads |
| NHRR➣Natural Hazard Risk Reduction (Organization of American States) |
| NHRR➣New Haven Rail Road |
| NHRR➣National High Risk Registry (Strang Cancer Prevention Center; New York, NY) |