vitriol vs assail

vitriol is a noun but assail is not a noun.

Word	Noun	Adjective	Verb	Adverb
vitriol	Yes	No	Yes	No
assail	No	No	Yes	No

As verbs, assail is a hypernym of vitriol; that is, assail is a word with a broader meaning than vitriol:

Other hypernyms of vitriol include assault, attack, lash out, round, snipe.

vitriol (noun)	assail (noun)
abusive or venomous language used to express blame or censure or bitter deep-seated ill will
(H2SO4) a highly corrosive acid made from sulfur dioxide; widely used in the chemical industry

vitriol (verb)	assail (verb)
subject to bitter verbal abuse	attack in speech or writing
expose to the effects of vitriol or injure with vitriol	attack someone physically or emotionally
	launch an attack or assault on; begin hostilities or start warfare with