suborder Mugiloidea vs Percomorphi

suborder Mugiloidea and Percomorphi both are nouns.

Word	Noun	Adjective	Verb	Adverb
suborder Mugiloidea	Yes	No	No	No
Percomorphi	Yes	No	No	No

suborder Mugiloidea (noun)	Percomorphi (noun)
fishes distinguished by abdominal pelvic fins: families Mugilidae; Atherinidae; Sphyraenidae	one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna