dollarfish vs horse-head

dollarfish and horse-head both are nouns.

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

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

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

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

dollarfish (noun)	horse-head (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