poster child vs fry

poster child and fry both are nouns.

Word	Noun	Adjective	Verb	Adverb
poster child	Yes	No	No	No
fry	Yes	No	Yes	No

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

poster child: a child afflicted by some disease or deformity whose picture is used on posters to raise money for charitable purposes
fry: a young person of either sex

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

poster child (noun)	fry (noun)
a child afflicted by some disease or deformity whose picture is used on posters to raise money for charitable purposes	a young person of either sex

poster child (verb)	fry (verb)
	cook in hot fat or oil
	kill by electrocution, as in the electric chair
	be excessively hot