order Percomorphi vs family Chaetodontidae

order Percomorphi and family Chaetodontidae both are nouns.

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

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