blue jack vs coho

blue jack and coho both are nouns.

Word	Noun	Adjective	Verb	Adverb
blue jack	Yes	No	No	No
coho	Yes	No	No	No

As nouns, blue jack and coho are synonyms defined as:

blue jack and coho: small salmon of northern Pacific coasts and the Great Lakes

Other synonyms of blue jack include coho salmon, cohoe, Oncorhynchus kisutch, silver salmon.

blue jack (noun)	coho (noun)
small salmon of northern Pacific coasts and the Great Lakes	small salmon of northern Pacific coasts and the Great Lakes
	fatty pinkish flesh of small salmon caught in the Pacific and Great Lakes