Atlantic moonfish vs horse-head

Atlantic moonfish and horse-head both are nouns.

Word	Noun	Adjective	Verb	Adverb
Atlantic moonfish	Yes	No	No	No
horse-head	Yes	No	No	No

As nouns, Atlantic moonfish and horse-head are synonyms defined as:

Atlantic moonfish and horse-head: any of several silvery marine fishes with very flat bodies

Other synonyms of Atlantic moonfish include dollarfish, horsefish, horsehead, moonfish, Selene setapinnis.

Atlantic moonfish (noun)	horse-head (noun)
any of several silvery marine fishes with very flat bodies	any of several silvery marine fishes with very flat bodies