candied apple vs candy apple

candied apple and candy apple both are nouns.

Word	Noun	Adjective	Verb	Adverb
candied apple	Yes	No	No	No
candy apple	Yes	No	No	No

As nouns, candied apple and candy apple are synonyms defined as:

candied apple and candy apple: an apple that is covered with a candy-like substance (usually caramelized sugar)

Other synonyms of candied apple include caramel apple, taffy apple, toffee apple.

candied apple (noun)	candy apple (noun)
an apple that is covered with a candy-like substance (usually caramelized sugar)	an apple that is covered with a candy-like substance (usually caramelized sugar)