What is another word for "sour"?

Roget's Thesaurus (1911) lists these synonyms for "sour": acerb, acerbity, acescent, acetic, acetose, acetous, acid, acidify, acidity, acidulate, acidulous, acrid, acridity, acrimonious, acrimony, add, aggravate, aggravating, aggravation, alum, amaritude, and, austerity, bad, bitter, bitterness, crab, crabbed, deteriorate, disgust, edge, embitter, enrage, envenom, exacerbate, exacerbation, exaggeration, exasperate, exasperation, excite.