family Pomacentridae vs Percomorphi

family Pomacentridae and Percomorphi both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Pomacentridae	Yes	No	No	No
Percomorphi	Yes	No	No	No

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