Oncorhynchus keta vs chum

Oncorhynchus keta and chum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oncorhynchus keta	Yes	No	No	No
chum	Yes	No	No	No

As nouns, Oncorhynchus keta and chum are synonyms defined as:

Oncorhynchus keta and chum: a large Pacific salmon with small spots on its back; an important food fish

Other synonyms of Oncorhynchus keta include chum salmon.

Oncorhynchus keta (noun)	chum (noun)
a large Pacific salmon with small spots on its back; an important food fish	a large Pacific salmon with small spots on its back; an important food fish
	bait consisting of chopped fish and fish oils that are dumped overboard to attract fish
	a close friend who accompanies his buddies in their activities