Oncorhynchus tshawytscha vs quinnat salmon

Oncorhynchus tshawytscha and quinnat salmon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oncorhynchus tshawytscha	Yes	No	No	No
quinnat salmon	Yes	No	No	No

As nouns, Oncorhynchus tshawytscha and quinnat salmon are synonyms defined as:

Oncorhynchus tshawytscha and quinnat salmon: large Pacific salmon valued as food; adults die after spawning

Other synonyms of Oncorhynchus tshawytscha include chinook, chinook salmon, king salmon.

Oncorhynchus tshawytscha (noun)	quinnat salmon (noun)
large Pacific salmon valued as food; adults die after spawning	large Pacific salmon valued as food; adults die after spawning