cornucopia vs horn of plenty

cornucopia and horn of plenty both are nouns.

Word	Noun	Adjective	Verb	Adverb
cornucopia	Yes	No	No	No
horn of plenty	Yes	No	No	No

As nouns, cornucopia and horn of plenty are synonyms defined as:

cornucopia and horn of plenty: a goat's horn filled with grain and flowers and fruit symbolizing prosperity

cornucopia (noun)	horn of plenty (noun)
the property of being extremely abundant	a goat's horn filled with grain and flowers and fruit symbolizing prosperity
a goat's horn filled with grain and flowers and fruit symbolizing prosperity