family Priacanthidae vs order Percomorphi

family Priacanthidae and order Percomorphi both are nouns.

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

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