juvenility vs jejuneness

juvenility and jejuneness both are nouns.

Word	Noun	Adjective	Verb	Adverb
juvenility	Yes	No	No	No
jejuneness	Yes	No	No	No

As nouns, juvenility and jejuneness are synonyms defined as:

juvenility and jejuneness: lacking and evidencing lack of experience of life

Other synonyms of juvenility include callowness.

juvenility (noun)	jejuneness (noun)
the freshness and vitality characteristic of a young person	the quality of being vapid and unsophisticated
lacking and evidencing lack of experience of life	quality of inadequate nutritive value
	lacking and evidencing lack of experience of life