caramel apple vs toffee apple

caramel apple and toffee apple both are nouns.

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

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

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

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

caramel apple (noun)	toffee 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)