Oncorhynchus nerka vs blueback salmon

Oncorhynchus nerka and blueback salmon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oncorhynchus nerka	Yes	No	No	No
blueback salmon	Yes	No	No	No

As nouns, Oncorhynchus nerka and blueback salmon are synonyms defined as:

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

Oncorhynchus nerka (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