juvenile vs tyke

juvenile and tyke both are nouns.

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

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

juvenile (noun)	tyke (noun)
a young person, not fully developed	a young person of either sex
	a crude uncouth ill-bred person lacking culture or refinement

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