Scombroidea vs Percomorphi

Scombroidea and Percomorphi both are nouns.

Word	Noun	Adjective	Verb	Adverb
Scombroidea	Yes	No	No	No
Percomorphi	Yes	No	No	No

Scombroidea (noun)	Percomorphi (noun)
mackerels, tunas, albacores, bonitos, swordfishes, sailfishes	one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna