chum salmon vs chum

chum salmon and chum both are nouns.

Word	Noun	Adjective	Verb	Adverb
chum salmon	Yes	No	No	No
chum	Yes	No	No	No

As nouns, chum salmon and chum are synonyms defined as:

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

Other synonyms of chum salmon include Oncorhynchus keta.

chum salmon (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