taffy apple vs caramel apple

taffy apple and caramel apple both are nouns.

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

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

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

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

taffy apple (noun)	caramel 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)