Percomorphi vs family Haemulidae

Percomorphi and family Haemulidae both are nouns.

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

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