centrarchid vs percoid

centrarchid and percoid both are nouns.

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

As nouns, percoid is a hypernym of centrarchid; that is, percoid 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
percoid: any of numerous spiny-finned fishes of the order Perciformes

Other hypernyms of centrarchid include percoid fish, percoidean.

centrarchid (noun)	percoid (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