| Abbreviation | Definition |
|---|---|
| NH | Novice High |
| NHA | North Hills Aquatics |
| NHB | No Holds Barred |
| NHB | North Huntington Beach Football Club |
| NHBW | No Holds Barred Wrestling |
| NHF | Nordic Hapkido Federation |
| NHG | New Haven Gaming Network |
| NHGC | Norfolk Hang Gliding Club |
| NHL | National Hockey League |
| NHL | Notekeu Hockey League |
| NHLPA | National Hockey League Players Association |
| NHO | New Hunting Order |
| NHRA | National Hot Rod Association |
| NHRR | NH Rough Riders |
| NHRR | North Herts Road Runners |
| NHSCA | National Highschool Coaches Association |
| NHSCC | National High School Cheerleading Championship |
| NIA | National Indoor Arena |
| NIAS | Northern Ireland Archery Society |
| NIBK | Nordåsgrenda InneBandyklubb |