order Percomorphi vs family Gempylidae

order Percomorphi and family Gempylidae both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Percomorphi	Yes	No	No	No
family Gempylidae	Yes	No	No	No

order Percomorphi (noun)	family Gempylidae (noun)
one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna	snake mackerels