NNH
| Acronym | Definition |
|---|---|
| NNH | Number Needed to Harm (medical) |
| NNH | Norske Naturterapeuters Hovedorganisasjon (Norweigan: Norweigan Association of Natural Medicine) |
| NNH | National Network for Health |
| NNH | Nissan Network Holdings (Japan) |
| NNH | Natal Native Horse (calvary unit) |
| NNH | Northern Natural History |
| NNH | Newbie Needs Help |