vernal vs young

vernal is not a noun while young is a noun.

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

As adjectives, vernal and young are synonyms defined as:

Other synonyms of vernal include youthful.

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

vernal (adjective)	young (adjective)
of or characteristic of or occurring in spring	(used of living things especially persons) in an early period of life or development or growth
suggestive of youth; vigorous and fresh	(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