1. chummy, matey, pally, palsy-walsy, friendly (vs. unfriendly)

usage: (used colloquially) having the relationship of friends or pals

2. chummy, buddy-buddy, thick(predicate), close (vs. distant)

usage: (used informally) associated on close terms; "a close friend"; "the bartender was chummy with the regular customers"; "the two were thick as thieves for months"

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See also: chummy (Dictionary)