scrod vs codfish

scrod and codfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
scrod	Yes	No	No	No
codfish	Yes	No	No	No

As nouns, codfish is a hypernym of scrod; that is, codfish is a word with a broader meaning than scrod:

scrod: young Atlantic cod or haddock especially one split and boned for cooking
codfish: major food fish of Arctic and cold-temperate waters

Other hypernyms of scrod include cod.

scrod (noun)	codfish (noun)
young Atlantic cod or haddock especially one split and boned for cooking	major food fish of Arctic and cold-temperate waters
flesh of young Atlantic cod weighing up to 2 pounds; also young haddock and pollock; often broiled	lean white flesh of important North Atlantic food fish; usually baked or poached