attack vs vitriol

attack and vitriol both are nouns.

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

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

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

attack (noun)	vitriol (noun)
(military) an offensive against an enemy (using weapons)	abusive or venomous language used to express blame or censure or bitter deep-seated ill will
a decisive manner of beginning a musical tone or phrase	(H2SO4) a highly corrosive acid made from sulfur dioxide; widely used in the chemical industry
the act of attacking
ideas or actions intended to deal with a problem or situation
an offensive move in a sport or game
strong criticism
intense adverse criticism
the onset of a corrosive or destructive process (as by a chemical agent)
a sudden occurrence of an uncontrollable condition

attack (verb)	vitriol (verb)
begin to injure	subject to bitter verbal abuse
set to work upon; turn one's energies vigorously to a task	expose to the effects of vitriol or injure with vitriol
attack in speech or writing
launch an attack or assault on; begin hostilities or start warfare with
take the initiative and go on the offensive
attack someone physically or emotionally