juvenile body vs human body

juvenile body and human body both are nouns.

Word	Noun	Adjective	Verb	Adverb
juvenile body	Yes	No	No	No
human body	Yes	No	No	No

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

Other hypernyms of juvenile body include anatomy, bod, build, chassis, figure, flesh, form, frame, material body, physical body, physique, shape, soma.

juvenile body (noun)	human body (noun)
the body of a young person	alternative names for the body of a human being