male child vs male person

male child and male person both are nouns.

Word	Noun	Adjective	Verb	Adverb
male child	Yes	No	No	No
male person	Yes	No	No	No

As nouns, male person is a hypernym of male child; that is, male person is a word with a broader meaning than male child:

Other hypernyms of male child include male.

male child (noun)	male person (noun)
a youthful male person	a person who belongs to the sex that cannot have babies