rejuvenate vs age

rejuvenate is not a noun while age is a noun.

Word	Noun	Adjective	Verb	Adverb
rejuvenate	No	No	Yes	No
age	Yes	No	Yes	No

rejuvenate (noun)	age (noun)
	how long something has existed
	a time of life (usually defined in years) at which some particular qualification or power arises
	a late time of life
	an era of history having some distinctive feature
	a prolonged period of time

rejuvenate (verb)	age (verb)
become young again	grow old or older
make younger or more youthful	begin to seem older; get older
develop youthful topographical features	make older
get or give new life or energy; return to life, regain energy, recuperate
cause (a stream or river) to erode, as by an uplift of the land