Selene vomer vs dollarfish

Selene vomer and dollarfish both are nouns.

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

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

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

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

Selene vomer (noun)	dollarfish (noun)
similar to moonfish but with eyes high on the truncated forehead	small food fish of Atlantic coast
	any of several silvery marine fishes with very flat bodies