lash out vs vitriol

lash out is not a noun while vitriol is a noun.

Word	Noun	Adjective	Verb	Adverb
lash out	No	No	Yes	No
vitriol	Yes	No	Yes	No

As verbs, vitriol is a hyponym of lash out; that is, vitriol is a word with a more specific, narrower meaning than lash out:

Other hyponyms of lash out include abuse, blackguard, clapperclaw, shout, claw, rip, whang, barrage, bombard, blister, scald, scorch, whip, rubbish.

lash out (noun)	vitriol (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

lash out (verb)	vitriol (verb)
attack in speech or writing	subject to bitter verbal abuse
	expose to the effects of vitriol or injure with vitriol