Acanthopterygii vs order Percomorphi

Acanthopterygii and order Percomorphi both are nouns.

Word	Noun	Adjective	Verb	Adverb
Acanthopterygii	Yes	No	No	No
order Percomorphi	Yes	No	No	No

Acanthopterygii (noun)	order Percomorphi (noun)
teleost fishes having fins with sharp bony rays	one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna