1 acerb, acid, acrid, aromatic, bitter, highly flavoured, hot, peppery, piquant, seasoned, sharp, sour, spicy, stinging, strong, tangy, tart
2 acrimonious, acute, barbed, biting, caustic, cutting, incisive, keen, mordacious, mordant, penetrating, piercing, poignant, pointed, sarcastic, scathing, sharp, stinging, stringent, telling, trenchant, vitriolic
Antonyms
bland, dull, inane, mild, moderate, tasteless, unsavoury, unstimulating, weak