scup vs southern porgy

scup and southern porgy both are nouns.

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

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

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

Other synonyms of scup include southern scup, Stenotomus aculeatus.

scup (noun)	southern porgy (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