family Chaetodontidae vs order Perciformes

family Chaetodontidae and order Perciformes both are nouns.

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

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