1) Acerbity 2) Acidity 3) Acidulousness 4) Illhumor 5) Sharpness 6) Tartness 7) Vinegariness 8) Vinegarishness 1) Acetous fermentation 2) Acid 3) Acidity 4) Bitter taste 5) Grimness 6) Gustatory perception 7) Gustatory sensation 8) Kraut property 9) Lack of humour 10) Lactic fermentation 11) Low ph 12) Severity 13) Smelliness 14) Sour 15) Sour taste 16) Staleness 17) Sternness 18) Tartness 19) Taste 20) Taste perception 
• (n.) The quality or state of being sour.
Sour'ness noun The quality or state of being sour. 
Unpleasant flavour which has a sharp, acid taste. Different from acidity, sometimes associated with over-fermented coffee.
[n] - the property of being acidic
sour noun the property of being acidic
A tart taste in wines, most often associated with acids and ethyl acetate. The degree of sourness in acid is a function of the pH of the wine and its titratable acidity. In technical terms, it is the hydrogen ion (actually, the hydronium ion) that stimulates the sour taste on the taste buds. The order of decreasing sourness of the primary organic a...