tiddler vs juvenile

tiddler and juvenile both are nouns.

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

As nouns, juvenile is a hypernym of tiddler; that is, juvenile is a word with a broader meaning than tiddler:

Other hypernyms of tiddler include juvenile person.

tiddler (noun)	juvenile (noun)
a young person of either sex	a young person, not fully developed

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