horse-head vs Selene setapinnis

horse-head and Selene setapinnis both are nouns.

Word	Noun	Adjective	Verb	Adverb
horse-head	Yes	No	No	No
Selene setapinnis	Yes	No	No	No

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

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

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

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