candy apple vs toffee apple

candy apple and toffee apple both are nouns.

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

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

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

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

candy 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)