vinegariness vs sourness

vinegariness and sourness both are nouns.

Word	Noun	Adjective	Verb	Adverb
vinegariness	Yes	No	No	No
sourness	Yes	No	No	No

As nouns, sourness is a hypernym of vinegariness; that is, sourness is a word with a broader meaning than vinegariness:

Other hypernyms of vinegariness include acidity, sour.

vinegariness (noun)	sourness (noun)
a sourness resembling that of vinegar	the property of being acidic
	a sullen moody resentful disposition
	the taste experience when vinegar or lemon juice is taken into the mouth