child prodigy vs nipper

child prodigy and nipper both are nouns.

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

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

Other hypernyms of child prodigy include child, fry, kid, minor, nestling, shaver, small fry, tiddler, tike, tyke, youngster, prodigy.

child prodigy (noun)	nipper (noun)
a prodigy whose talents are recognized at an early age	a grasping structure on the limb of a crustacean or other arthropods
	a young person of either sex