centrarchid vs percoidean

centrarchid and percoidean both are nouns.

Word	Noun	Adjective	Verb	Adverb
centrarchid	Yes	No	No	No
percoidean	Yes	No	No	No

As nouns, percoidean is a hypernym of centrarchid; that is, percoidean is a word with a broader meaning than centrarchid:

centrarchid: small carnivorous freshwater percoid fishes of North America usually having a laterally compressed body and metallic luster: crappies, black bass, bluegills, pumpkinseed
percoidean: any of numerous spiny-finned fishes of the order Perciformes

Other hypernyms of centrarchid include percoid, percoid fish.

centrarchid (noun)	percoidean (noun)
small carnivorous freshwater percoid fishes of North America usually having a laterally compressed body and metallic luster: crappies, black bass, bluegills, pumpkinseed	any of numerous spiny-finned fishes of the order Perciformes