convalesce vs perk

convalesce is not a noun while perk is a noun.

Word	Noun	Adjective	Verb	Adverb
convalesce	No	No	Yes	No
perk	Yes	No	Yes	No

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

Other hyponyms of convalesce include gain vigor, percolate, perk up, pick up, snap back.

convalesce (noun)	perk (noun)
	an incidental benefit awarded for certain types of employment (especially if it is regarded as a right)

convalesce (verb)	perk (verb)
get over an illness or shock	gain or regain energy