sockeye vs blueback salmon

sockeye and blueback salmon both are nouns.

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

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

sockeye and blueback 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 sockeye include Oncorhynchus nerka, red salmon, sockeye salmon.

sockeye (noun)	blueback 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