controvert vs dissent

controvert is not a noun while dissent is a noun.

Word	Noun	Adjective	Verb	Adverb
controvert	No	No	Yes	No
dissent	Yes	No	Yes	No

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

Other hyponyms of controvert include blackball, negative, veto, protest, resist.

controvert (noun)	dissent (noun)
	the act of protesting; a public (often organized) manifestation of dissent
	(law) the difference of one judge's opinion from that of the majority
	a difference of opinion

controvert (verb)	dissent (verb)
prove to be false or incorrect	withhold assent
be resistant to	be of different opinions
	express opposition through action or words