silver salmon vs Oncorhynchus kisutch

silver salmon and Oncorhynchus kisutch both are nouns.

Word	Noun	Adjective	Verb	Adverb
silver salmon	Yes	No	No	No
Oncorhynchus kisutch	Yes	No	No	No

As nouns, silver salmon and Oncorhynchus kisutch are synonyms defined as:

silver salmon and Oncorhynchus kisutch: small salmon of northern Pacific coasts and the Great Lakes

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

silver salmon (noun)	Oncorhynchus kisutch (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