HNA
- Acetic acid
- HNA Group
- Hafslund (company)
- Hanamaki Airport
- Harry N. Abrams, Inc.
- Hawks Nest Airport
- Heeresnachrichtenamt
- Hereditary neuralgic amyotrophy
- Heslar Naval Armory
- Hessische/Niedersächsische Allgemeine
- High North Alliance
- Hilti North America
- Hina language
- Hinton Admiral railway station
- Holy Names Academy
- Hoosier Nationals ABA
- Hydrofluoric acid
- Neutrophil
- Nitric acid
- Wright etch