vitriol vs contumely

vitriol and contumely both are nouns.

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

As nouns, contumely is a hypernym of vitriol; that is, contumely is a word with a broader meaning than vitriol:

vitriol: abusive or venomous language used to express blame or censure or bitter deep-seated ill will
contumely: a rude expression intended to offend or hurt

Other hypernyms of vitriol include abuse, insult, revilement, vilification.

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

vitriol (verb)	contumely (verb)
subject to bitter verbal abuse
expose to the effects of vitriol or injure with vitriol