contravene vs breach

contravene is not a noun while breach is a noun.

Word	Noun	Adjective	Verb	Adverb
contravene	No	No	Yes	No
breach	Yes	No	Yes	No

As verbs, breach is a hypernym of contravene; that is, breach is a word with a broader meaning than contravene:

Other hypernyms of contravene include break, go against, infract, offend, transgress, violate.

contravene (noun)	breach (noun)
	a failure to perform some promised act or obligation
	a personal or social separation (as between opposing factions)
	an opening (especially a gap in a dike or fortification)

contravene (verb)	breach (verb)
deny the truth of	make an opening or gap in
go against, as of rules and laws	act in disregard of laws, rules, contracts, or promises