Chum

Definition:

(n.) A roommate, especially in a college or university; an old and intimate friend.
(v. i.) To occupy a chamber with another; as, to chum together at college.
(n.) Chopped pieces of fish used as bait.

Compare chum with other words:

chum vs. confidant

chum vs. chummy

chum vs. rancid

accompany vs. chum

chum vs. socialize

chum vs. roommate

chum vs. friend