order Perciformes vs Percoidea

order Perciformes and Percoidea both are nouns.

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

order Perciformes (noun)	Percoidea (noun)
one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna	in some classifications nearly or exactly equivalent to the Perciformes which are considered a suborder