rock bass vs rock sunfish

rock bass and rock sunfish both are nouns.

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

As nouns, rock bass and rock sunfish are synonyms defined as:

rock bass and rock sunfish: game and food fish of upper Mississippi and Great Lakes

Other synonyms of rock bass include Ambloplites rupestris.

rock bass (noun)	rock sunfish (noun)
game and food fish of upper Mississippi and Great Lakes	game and food fish of upper Mississippi and Great Lakes
a kind of sea bass