dory vs blue walleye

dory and blue walleye both are nouns.

Word	Noun	Adjective	Verb	Adverb
dory	Yes	No	No	No
blue walleye	Yes	No	No	No

As nouns, blue walleye is a hyponym of dory; that is, blue walleye is a word with a more specific, narrower meaning than dory:

Other hyponyms of dory include blue pickerel, blue pike, blue pikeperch, Strizostedion vitreum glaucum.

dory (noun)	blue walleye (noun)
marine fishes widely distributed in mid-waters and deep slope waters	variety inhabiting the Great Lakes
pike-like freshwater perches
a small boat of shallow draft with cross thwarts for seats and rowlocks for oars with which it is propelled