A14 may refer to:
- Curtiss XA-14 Shrike, a 1930s-era ground-attack airplane
- Aero A.14, a Czech reconnaissance aircraft built after World War I
- ATC code A14 Anabolic agents for systemic use, a subgroup of the Anatomical Therapeutic Chemical Classification System
- British NVC community A14 (Myriophyllum alterniflorum community), a British Isles plant community
- Fiat A.14, a 1917 Italian 12-cylinder, liquid-cooled, V aero engine
- HMNZS Resolution (A14), a 1989 hydrographic ship of the Royal New Zealand Navy
- HMS A.14, an alternate name for HMS B1, a submarine of the British Royal Navy
- Nissan A14, a 1975–2008 car engine
- English Opening, Encyclopaedia of Chess Openings code
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