young vs young

young and young both are nouns.

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

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

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