Priacanthidae vs Perciformes

Priacanthidae and Perciformes both are nouns.

Word	Noun	Adjective	Verb	Adverb
Priacanthidae	Yes	No	No	No
Perciformes	Yes	No	No	No

Priacanthidae (noun)	Perciformes (noun)
small carnivorous percoid fishes found worldwide in tropical seas	one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna