horsehead vs Selene setapinnis

horsehead and Selene setapinnis both are nouns.

Word	Noun	Adjective	Verb	Adverb
horsehead	Yes	No	No	No
Selene setapinnis	Yes	No	No	No

As nouns, horsehead and Selene setapinnis are synonyms defined as:

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

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

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