prepubescent vs human

prepubescent is not a noun while human is a noun.

Word	Noun	Adjective	Verb	Adverb
prepubescent	No	Yes	No	No
human	Yes	Yes	No	No

prepubescent (noun)	human (noun)
	any living or extinct member of the family Hominidae characterized by superior intelligence, articulate speech, and erect carriage

prepubescent (adjective)	human (adjective)
(especially of human beings) at the age immediately before puberty; often marked by accelerated growth	having human form or attributes as opposed to those of animals or divine beings
	characteristic of humanity
	relating to a person