girl wonder vs prodigy

girl wonder and prodigy both are nouns.

Word	Noun	Adjective	Verb	Adverb
girl wonder	Yes	No	No	No
prodigy	Yes	No	No	No

As nouns, prodigy is a hypernym of girl wonder; that is, prodigy is a word with a broader meaning than girl wonder:

girl wonder: an extremely talented young female person
prodigy: an unusually gifted or intelligent (young) person; someone whose talents excite wonder and admiration

Other hypernyms of girl wonder include female, female person.

girl wonder (noun)	prodigy (noun)
an extremely talented young female person	an impressive or wonderful example of a particular quality
	a sign of something about to happen
	an unusually gifted or intelligent (young) person; someone whose talents excite wonder and admiration