recuperate vs regress

recuperate is not a noun while regress is a noun.

Word	Noun	Adjective	Verb	Adverb
recuperate	No	No	Yes	No
regress	Yes	No	Yes	No

As verbs, regress is a hypernym of recuperate; that is, regress is a word with a broader meaning than recuperate:

Other hypernyms of recuperate include retrovert, return, revert, turn back.

recuperate (noun)	regress (noun)
	returning to a former state
	the reasoning involved when you assume the conclusion is true and reason backward to the evidence

recuperate (verb)	regress (verb)
get over an illness or shock	go back to bad behavior
restore to good health or strength	get worse or fall back to a previous condition
regain a former condition after a financial loss	go back to a previous state
regain or make up for	go back to a statistical means