horsehead vs horsefish

horsehead and horsefish both are nouns.

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

As nouns, horsehead and horsefish are synonyms defined as:

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

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

horsehead (noun)	horsefish (noun)
any of several silvery marine fishes with very flat bodies	any of several silvery marine fishes with very flat bodies