acerb vs vitriolic

acerb and vitriolic both are adjectives.

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

As adjectives, acerb and vitriolic are synonyms defined as:

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

acerb (adjective)	vitriolic (adjective)
sour or bitter in taste	of a substance, especially a strong acid; capable of destroying or eating away by chemical action
harsh or corrosive in tone	harsh or corrosive in tone