fangirl vs female person

fangirl and female person both are nouns.

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

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

fangirl: A female fan who is obsessive about a particular subject (especially, someone or something in popular entertainment media)
female person: a person who belongs to the sex that can have babies

Other hypernyms of fangirl include female, buff, devotee, fan, lover.

fangirl (noun)	female person (noun)
A female fan who is obsessive about a particular subject (especially, someone or something in popular entertainment media)	a person who belongs to the sex that can have babies

fangirl (verb)	female person (verb)
to be a extreme female fan of something