| Acronym | Definition |
|---|
| NTRA➣National Thoroughbred Racing Association |
| NTRA➣National Telecommunication Regulatory Authority (Egypt) |
| NTRA➣National Training Reform Agenda |
| NTRA➣Nano Technology Research Association (Korea) |
| NTRA➣Norwegian Telecommunications Regulatory Authority |
| NTRA➣National Touch Rugby Association (Australia) |
| NTRA➣National Trail Racing Association |
| NTRA➣National Team Roping Association |
| NTRA➣North Trent Research Alliance (UK) |
| NTRA➣National Towing & Recovery Association |
| NTRA➣National Tenants & Residents Association |
| NTRA➣National Tot Rod Association (UK) |
| NTRA➣National TESD Research Agenda (Philippines) |
| NTRA➣Nanaimo Therapeutic Riding Association |
| NTRA➣National Tumor Registrars Association, Inc. |
| NTRA➣North Texas Rehabilitation Association |
| NTRA➣National Tyre Recycling Association (UK) |