1. Tasting or smelling like vinegar
   - acetous, vinegary, vinegarish

See also: sour

• action stations
• action-packed
• actionable
• actioner
• Actitis
• Actitis hypoleucos
• Actitis macularia
• Actium
• Activase
• activate
• activated
• activated carbon
• activated charcoal
• activating
• activating agent
• activation
• 39th
• 3d radar
• 3rd
• 3rd October Organization
• 3TC
• 4
• 4-dimensional
• 4-hitter
• 4-membered