female person vs someone

female person and someone both are nouns.

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

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

female person: a person who belongs to the sex that can have babies
someone: a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential

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

female person (noun)	someone (noun)
a person who belongs to the sex that can have babies	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential