order Percomorphi vs family Opisthognathidae

order Percomorphi and family Opisthognathidae both are nouns.

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

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