eelpout vs codfish

eelpout and codfish both are nouns.

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

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

eelpout: elongate freshwater cod of northern Europe and Asia and North America having barbels around its mouth
codfish: major food fish of Arctic and cold-temperate waters

Other hypernyms of eelpout include cod.

eelpout (noun)	codfish (noun)
marine eellike mostly bottom-dwelling fishes of northern seas	major food fish of Arctic and cold-temperate waters
elongate freshwater cod of northern Europe and Asia and North America having barbels around its mouth	lean white flesh of important North Atlantic food fish; usually baked or poached