whitefish vs cisco

whitefish and cisco both are nouns.

Word	Noun	Adjective	Verb	Adverb
whitefish	Yes	No	No	No
cisco	Yes	No	No	No

As nouns, cisco is a hyponym of whitefish; that is, cisco is a word with a more specific, narrower meaning than whitefish:

whitefish: silvery herring-like freshwater food fish of cold lakes of the Northern Hemisphere
cisco: important food fish of cold deep lakes of North America

As nouns, cisco is a hyponym of whitefish; that is, cisco is a word with a more specific, narrower meaning than whitefish:

whitefish: flesh of salmon-like or trout-like cold-water fish of cold lakes of the Northern Hemisphere
cisco: cold-water fish caught in Lake Superior and northward

Other hyponyms of whitefish include lake herring.

whitefish (noun)	cisco (noun)
silvery herring-like freshwater food fish of cold lakes of the Northern Hemisphere	important food fish of cold deep lakes of North America
flesh of salmon-like or trout-like cold-water fish of cold lakes of the Northern Hemisphere	cold-water fish caught in Lake Superior and northward
any market fish--edible saltwater fish or shellfish--except herring