horsehead vs moonfish

horsehead and moonfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
horsehead	Yes	No	No	No
moonfish	Yes	No	No	No

As nouns, horsehead and moonfish are synonyms defined as:

horsehead and moonfish: any of several silvery marine fishes with very flat bodies

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

horsehead (noun)	moonfish (noun)
any of several silvery marine fishes with very flat bodies	large elliptical brightly colored deep-sea fish of Atlantic and Pacific and Mediterranean
	any of several silvery marine fishes with very flat bodies