THESAURUS
acidulous
acerb, acerbate, acerbic, acetic, acetose, acetous, acid, acidic, acidulated, acidulent, acrid, acrimonious, astringent, biting, bitter, burning, caustic, choleric, corroding, corrosive, cutting, double-edged, dry, edged, embittered, escharotic, fierce, harsh, hyperacid, incisive, keen, mordacious, mordant, penetrating, piercing, piquant, poignant, pungent, rancorous, rankled, resentful, resenting, rigorous, rough, scathing, scorching, severe, sharp, sore, splenetic, stabbing, stewing, stinging, strident, stringent, subacid, subacidulous, tart, trenchant, vehement, violent, virulent, vitriolic, withering
ROGET THESAURUS
acidulous
Sourness
N
sourness, acid, acidity, low pH, acetous fermentation, lactic fermentation, vinegar, verjuice, crab, alum, acetic acid, lactic acid, sour, acid,
acidulous, acidulated, tart, crabbed, acetous, acetose, acerb, acetic, sour as vinegar, sourish, acescent, subacid, styptic, hard, rough, sour as a lemon, (4) Odor.