Branchiostegidae vs order Perciformes

Branchiostegidae and order Perciformes both are nouns.

Word	Noun	Adjective	Verb	Adverb
Branchiostegidae	Yes	No	No	No
order Perciformes	Yes	No	No	No

Branchiostegidae (noun)	order Perciformes (noun)
small family of marine fishes having covered gills	one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna