sockeye salmon vs genus Oncorhynchus

sockeye salmon and genus Oncorhynchus both are nouns.

Word	Noun	Adjective	Verb	Adverb
sockeye salmon	Yes	No	No	No
genus Oncorhynchus	Yes	No	No	No

sockeye salmon (noun)	genus Oncorhynchus (noun)
small salmon with red flesh; found in rivers and tributaries of the northern Pacific and valued as food; adults die after spawning	Pacific salmon including sockeye salmon, chinook salmon, chum salmon, coho salmon
fatty red flesh of salmon of Pacific coast and rivers