vitriolic vs mordant

vitriolic is not a noun while mordant is a noun.

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

As adjectives, vitriolic and mordant are synonyms defined as:

vitriolic and mordant: of a substance, especially a strong acid; capable of destroying or eating away by chemical action

Other synonyms of vitriolic include caustic, corrosive, erosive.

vitriolic (noun)	mordant (noun)
	a substance used to treat leather or other materials before dyeing; aids in dyeing process

vitriolic (adjective)	mordant (adjective)
of a substance, especially a strong acid; capable of destroying or eating away by chemical action	of a substance, especially a strong acid; capable of destroying or eating away by chemical action
harsh or corrosive in tone	harshly ironic or sinister