| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | bitter, sharp, or sour |
| Synonyms: | acidic, acrid, astringent, caustic, harsh, sharp, tart |
| Main Entry: | acid |
| Part of Speech: | adjective |
| Definition: | having acidic, corrosive properties |
| Synonyms: | acerbic, acidulous, acrid, anti-alkaline, biting, bleaching, corroding, disintegrative, dissolvent, eating away, eroding, erosive, oxidizing, rusting |
| Antonyms: | basic |
| Main Entry: | acid |
| Part of Speech: | adjective |
| Definition: | bitter in words or behavior |
| Synonyms: | acerbic, biting, caustic, cutting, dry, harsh, hateful, hurtful, mordant, nasty, offensive, sarcastic, sharp, stinging, trenchant, vitriolic |
| Antonyms: | kind, nice |
| Main Entry: | acidulous |
| Part of Speech: | adjective |
| Definition: | bitter, sour |
| Synonyms: | acerb, acerbic, acetose, dry, piquant, sharp, tart |
| Antonyms: | sugary, sweet |
| Main Entry: | acrimonious |
| Part of Speech: | adjective |
| Definition: | nasty in behavior, speech |
| Synonyms: | acerbic, acid, angry, astringent, belligerent, biting, bitter, caustic, censorious, churlish, crabby, cranky, cross, cutting, indignant, irascible, irate, ireful, mad, mordant, peevish, petulant, rancorous, sarcastic, sharp, spiteful, splenetic, tart, testy, trenchant, wrathful |
| Antonyms: | kind, kindly, peaceable |
| Main Entry: | biting |
| Part of Speech: | adjective |
| Definition: | sarcastic |
| Synonyms: | acerbic, acrimonious, bitter, caustic, cutting, incisive, mordant, scathing, severe, sharp, stinging, trenchant, withering |
| Antonyms: | kind, nice, sweet |
| Main Entry: | bitter |
| Part of Speech: | adjective |
| Definition: | pungent, sharp |
| Synonyms: | absinthal, absinthian, acerb, acerbic, acid, acrid, amaroidal, astringent, harsh, sour, tart, unsweetened, vinegary |
| Antonyms: | bland, mild, pleasant, sweet |
| Main Entry: | caustic |
| Part of Speech: | adjective |
| Definition: | burning, corrosive |
| Synonyms: | abrasive, acerbic, acid, acrid, alkaline, astringent, biting, corroding, erosive, keen, mordant, pungent, tart |
| Antonyms: | calm, mild, soothing |
| Main Entry: | caustic |
| Part of Speech: | adjective |
| Definition: | sarcastic |
| Synonyms: | acerb, acerbic, acrimonious, bitter, cutting, harsh, incisive, pithy, pungent, rough, salty, satiric, scathing, severe, sharp, stinging, trenchant, virulent |
| Antonyms: | kind, nice, unsarcastic |