Pomacentridae vs order Perciformes

Pomacentridae and order Perciformes both are nouns.

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

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