Percomorphi vs family Priacanthidae

Percomorphi and family Priacanthidae both are nouns.

Word	Noun	Adjective	Verb	Adverb
Percomorphi	Yes	No	No	No
family Priacanthidae	Yes	No	No	No

Percomorphi (noun)	family Priacanthidae (noun)
one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna	small carnivorous percoid fishes found worldwide in tropical seas