white perch vs Morone americana

white perch and Morone americana both are nouns.

Word	Noun	Adjective	Verb	Adverb
white perch	Yes	No	No	No
Morone americana	Yes	No	No	No

As nouns, white perch and Morone americana are synonyms defined as:

white perch and Morone americana: small silvery food and game fish of eastern United States streams

Other synonyms of white perch include silver perch.

white perch (noun)	Morone americana (noun)
small silvery food and game fish of eastern United States streams	small silvery food and game fish of eastern United States streams