vitriolic vs acid

vitriolic is not a noun while acid is a noun.

Word	Noun	Adjective	Verb	Adverb
vitriolic	No	Yes	No	No
acid	Yes	Yes	No	No

As adjectives, vitriolic and acid are synonyms defined as:

Other synonyms of vitriolic include acerb, acerbic, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent.

vitriolic (noun)	acid (noun)
	street name for lysergic acid diethylamide
	any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

vitriolic (adjective)	acid (adjective)
of a substance, especially a strong acid; capable of destroying or eating away by chemical action	having the characteristics of an acid
harsh or corrosive in tone	being sour to the taste
	harsh or corrosive in tone