Chaetodontidae vs order Percomorphi

Chaetodontidae and order Percomorphi both are nouns.

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

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