prodigy vs boy wonder

prodigy and boy wonder both are nouns.

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

As nouns, boy wonder is a hyponym of prodigy; that is, boy wonder is a word with a more specific, narrower meaning than prodigy:

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

Other hyponyms of prodigy include child prodigy, infant prodigy, wonder child, girl wonder.

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