wonder child vs infant prodigy

wonder child and infant prodigy both are nouns.

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

As nouns, wonder child and infant prodigy are synonyms defined as:

wonder child and infant prodigy: a prodigy whose talents are recognized at an early age

Other synonyms of wonder child include child prodigy.

wonder child (noun)	infant prodigy (noun)
a prodigy whose talents are recognized at an early age	a prodigy whose talents are recognized at an early age