inexperienced vs young

inexperienced is not a noun while young is a noun.

Word	Noun	Adjective	Verb	Adverb
inexperienced	No	Yes	No	No
young	Yes	Yes	No	No

inexperienced (noun)	young (noun)
	any immature animal
	young people collectively

inexperienced (adjective)	young (adjective)
lacking practical experience or training	(used of living things especially persons) in an early period of life or development or growth
	(of crops) harvested at an early stage of development; before complete maturity
	not tried or tested by experience
	being in its early stage
	suggestive of youth; vigorous and fresh