fangirl vs lover

fangirl and lover both are nouns.

Word	Noun	Adjective	Verb	Adverb
fangirl	Yes	No	Yes	No
lover	Yes	No	No	No

As nouns, lover is a hypernym of fangirl; that is, lover 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)
lover: an ardent follower and admirer

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

fangirl (noun)	lover (noun)
A female fan who is obsessive about a particular subject (especially, someone or something in popular entertainment media)	a person who loves someone or is loved by someone
	an ardent follower and admirer
	a significant other to whom you are not related by marriage

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