rejuvenate vs rejuvenation

rejuvenate is not a noun while rejuvenation is a noun.

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

rejuvenate (noun)	rejuvenation (noun)
	the act of restoring to a more youthful condition
	the phenomenon of vitality and freshness being restored

rejuvenate (verb)	rejuvenation (verb)
become young again
make younger or more youthful
develop youthful topographical features
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