kiddie vs small fry

kiddie and small fry both are nouns.

Word	Noun	Adjective	Verb	Adverb
kiddie	Yes	No	No	No
small fry	Yes	No	No	No

As nouns, small fry is a hypernym of kiddie; that is, small fry is a word with a broader meaning than kiddie:

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

kiddie (noun)	small fry (noun)
informal term for a young child	someone who is small and insignificant
	a young person of either sex