shaver vs juvenile

shaver and juvenile both are nouns.

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

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

Other hypernyms of shaver include juvenile person.

shaver (noun)	juvenile (noun)
a razor powered by an electric motor	a young person, not fully developed
a young person of either sex
an adult male who shaves

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