juvenile vs kid

juvenile and kid both are nouns.

Word	Noun	Adjective	Verb	Adverb
juvenile	Yes	Yes	No	No
kid	Yes	No	Yes	No

As nouns, kid is a hyponym of juvenile; that is, kid is a word with a more specific, narrower meaning than juvenile:

juvenile (noun)	kid (noun)
a young person, not fully developed	young goat
	a young person of either sex
	a human offspring (son or daughter) of any age
	soft smooth leather from the hide of a young goat

juvenile (adjective)	kid (adjective)
of or relating to or characteristic of or appropriate for children or young people
displaying or suggesting a lack of maturity

juvenile (verb)	kid (verb)
	be silly or tease one another
	tell false information to for fun