order Perciformes vs Priacanthidae

order Perciformes and Priacanthidae both are nouns.

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

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