horse-head vs horsefish

horse-head and horsefish both are nouns.

Word	Noun	Adjective	Verb	Adverb
horse-head	Yes	No	No	No
horsefish	Yes	No	No	No

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

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

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

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