sockeye vs Oncorhynchus nerka

sockeye and Oncorhynchus nerka both are nouns.

Word	Noun	Adjective	Verb	Adverb
sockeye	Yes	No	No	No
Oncorhynchus nerka	Yes	No	No	No

As nouns, sockeye and Oncorhynchus nerka are synonyms defined as:

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

sockeye (noun)	Oncorhynchus nerka (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