rock sunfish vs centrarchid

rock sunfish and centrarchid both are nouns.

Word	Noun	Adjective	Verb	Adverb
rock sunfish	Yes	No	No	No
centrarchid	Yes	No	No	No

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

rock sunfish: game and food fish of upper Mississippi and Great Lakes
centrarchid: small carnivorous freshwater percoid fishes of North America usually having a laterally compressed body and metallic luster: crappies, black bass, bluegills, pumpkinseed

Other hypernyms of rock sunfish include sunfish.

rock sunfish (noun)	centrarchid (noun)
game and food fish of upper Mississippi and Great Lakes	small carnivorous freshwater percoid fishes of North America usually having a laterally compressed body and metallic luster: crappies, black bass, bluegills, pumpkinseed