recidivate vs relapse

recidivate is not a noun while relapse is a noun.

Word	Noun	Adjective	Verb	Adverb
recidivate	No	No	Yes	No
relapse	Yes	No	Yes	No

As verbs, recidivate and relapse are synonyms defined as:

Other synonyms of recidivate include fall back, lapse, regress, retrogress.

recidivate (noun)	relapse (noun)
	a failure to maintain a higher state

recidivate (verb)	relapse (verb)
go back to bad behavior	go back to bad behavior
	deteriorate in health