sockeye salmon vs salmon

sockeye salmon and salmon both are nouns.

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

As nouns, salmon is a hypernym of sockeye salmon; that is, salmon is a word with a broader meaning than sockeye salmon:

sockeye salmon: small salmon with red flesh; found in rivers and tributaries of the northern Pacific and valued as food; adults die after spawning
salmon: any of various large food and game fishes of northern waters; usually migrate from salt to fresh water to spawn

As nouns, salmon is a hypernym of sockeye salmon; that is, salmon is a word with a broader meaning than sockeye salmon:

sockeye salmon: fatty red flesh of salmon of Pacific coast and rivers
salmon: flesh of any of various marine or freshwater fish of the family Salmonidae

sockeye salmon (noun)	salmon (noun)
small salmon with red flesh; found in rivers and tributaries of the northern Pacific and valued as food; adults die after spawning	any of various large food and game fishes of northern waters; usually migrate from salt to fresh water to spawn
fatty red flesh of salmon of Pacific coast and rivers	a pale pinkish orange color
	flesh of any of various marine or freshwater fish of the family Salmonidae

sockeye salmon (adjective)	salmon (adjective)
	of orange tinged with pink