male person vs someone

male person and someone both are nouns.

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

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

male person: a person who belongs to the sex that cannot have babies
someone: a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential

Other hypernyms of male person include individual, mortal, person, somebody, soul.

male person (noun)	someone (noun)
a person who belongs to the sex that cannot have babies	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential