CAH
- Calvin and Hobbes
- Cambridge Ancient History
- Capital Airport Holding
- Cardinal Health
- Cards Against Humanity
- Cement chemist notation
- Chlorinated Aromatic Hydrocarbon
- Community of All Hallows
- Congenital adrenal hyperplasia
- Controlled-access highway
- Crime against humanity
- Critical Access Hospital
- Cà Mau Airport
- List of defunct airlines of South Africa
- Sohcahtoa