order Perciformes vs Serranidae

order Perciformes and Serranidae both are nouns.

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

order Perciformes (noun)	Serranidae (noun)
one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna	marine fishes: sea basses, sea perches, groupers, jewfish