dollarfish vs horsehead

dollarfish and horsehead both are nouns.

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

As nouns, dollarfish and horsehead are synonyms defined as:

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

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

dollarfish (noun)	horsehead (noun)
small food fish of Atlantic coast	any of several silvery marine fishes with very flat bodies
any of several silvery marine fishes with very flat bodies