Synonyms for Chum (same or very similar meaning)
WordNet sense 1 (a close friend who accompanies his buddies in their activities):
brother, buddy, crony, pal, sidekickWordNet sense 2 (a large Pacific salmon with small spots on its back; an important food fish):
chum salmon, Oncorhynchus ketaFrom the ODE community, based on WordNetadd/edit