candy apple vs taffy apple

candy apple and taffy apple both are nouns.

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

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

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

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

candy apple (noun)	taffy 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)