pubescence vs pubescent

pubescence is a noun but pubescent is not a noun.

Word	Noun	Adjective	Verb	Adverb
pubescence	Yes	No	No	No
pubescent	No	Yes	No	No

pubescence (noun)	pubescent (noun)
the time of life when sex glands become functional

pubescence (adjective)	pubescent (adjective)
	covered with fine soft hairs or down
	(of animals especially human beings) having arrived at the onset of puberty (the age at which sex glands become functional) but not yet fully mature