red salmon vs sockeye salmon

red salmon and sockeye salmon both are nouns.

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

As nouns, red salmon and sockeye salmon are synonyms defined as:

red salmon and sockeye salmon: small salmon with red flesh; found in rivers and tributaries of the northern Pacific and valued as food; adults die after spawning

Other synonyms of red salmon include blueback salmon, Oncorhynchus nerka, sockeye.

As nouns, red salmon and sockeye salmon are synonyms defined as:

red salmon and sockeye salmon: fatty red flesh of salmon of Pacific coast and rivers

Other synonyms of red salmon include sockeye.

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