Selene vomer vs horsefish

Selene vomer and horsefish both are nouns.

Word	Noun	Adjective	Verb	Adverb
Selene vomer	Yes	No	No	No
horsefish	Yes	No	No	No

As nouns, horsefish is a hypernym of Selene vomer; that is, horsefish is a word with a broader meaning than Selene vomer:

Selene vomer: similar to moonfish but with eyes high on the truncated forehead
horsefish: any of several silvery marine fishes with very flat bodies

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

Selene vomer (noun)	horsefish (noun)
similar to moonfish but with eyes high on the truncated forehead	any of several silvery marine fishes with very flat bodies