pollock vs gadoid

pollock and gadoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
pollock	Yes	No	No	No
gadoid	Yes	No	No	No

As nouns, gadoid is a hypernym of pollock; that is, gadoid is a word with a broader meaning than pollock:

pollock: important food and game fish of northern seas (especially the northern Atlantic); related to cod
gadoid: a soft-finned fish of the family Gadidae

Other hypernyms of pollock include gadoid fish.

pollock (noun)	gadoid (noun)
important food and game fish of northern seas (especially the northern Atlantic); related to cod	a soft-finned fish of the family Gadidae
lean white flesh of North Atlantic fish; similar to codfish