scup vs southern scup

scup and southern scup both are nouns.

Word	Noun	Adjective	Verb	Adverb
scup	Yes	No	No	No
southern scup	Yes	No	No	No

As nouns, scup and southern scup are synonyms defined as:

scup and southern scup: porgy of southern Atlantic coastal waters of North America

Other synonyms of scup include southern porgy, Stenotomus aculeatus.

scup (noun)	southern scup (noun)
porgy of southern Atlantic coastal waters of North America	porgy of southern Atlantic coastal waters of North America
found in Atlantic coastal waters of North America from South Carolina to Maine; esteemed as a panfish
lean flesh of fish found in warm waters of southern Atlantic coast of the United States
flesh of fish found in colder waters of northern Atlantic coast of the United States