prodigy vs wonder child

prodigy and wonder child both are nouns.

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

As nouns, wonder child is a hyponym of prodigy; that is, wonder child 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
wonder child: a prodigy whose talents are recognized at an early age

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

prodigy (noun)	wonder child (noun)
an impressive or wonderful example of a particular quality	a prodigy whose talents are recognized at an early age
a sign of something about to happen
an unusually gifted or intelligent (young) person; someone whose talents excite wonder and admiration