Percomorphi vs family Stromateidae

Percomorphi and family Stromateidae both are nouns.

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

Percomorphi (noun)	family Stromateidae (noun)
one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna	butterfishes: harvest fishes; dollar fishes