Roget's Thesaurus

#397. Sourness

Nouns

sourness etc. adj.; acid, acidity, low pH; acetous fermentation, lactic fermentation. vinegar, verjuice, crab, alum; acetic acid, lactic acid.

Verbs

be sour; sour, turn sour etc. adj.; set the teeth on edge. render sour etc. adj.; acidify, acidulate.

Adjectives

sour; acid, acidulous, acidulated; tart, crabbed; acetous, acetose; acerb, acetic; sour as vinegar, sourish, acescent, subacid [Chem]; styptic, hard, rough.

Phrases

sour as a lemon.