Achi
- Achi (Nigeria)
- Achi (game)
- Achi Brandt
- Achi Monastery
- Achi language
- Achi people
- Achi, Jalal-Abad
- Achi, Nagano
- Achi, Ozurgeti Municipality
- Achí, Bolívar
- Advanced Host Controller Interface
- Astrid Achi
- Australasian College of Health Informatics
- Australian Classification of Health Interventions
- Brachystegia eurycoma
- Rabinal Achí
- William Charles Achi
- William Charles Achi, Jr.