friendly -
characteristic of or befitting a friend; "friendly advice"; "a friendly neighborhood"; "the only friendly person here"; "a friendly host and hostess"
unfriendly not disposed to friendship or friendliness; "an unfriendly coldness of manner"; "an unfriendly action to take"
amicable characterized by friendship and good will
congenial (used of plants) capable of cross-fertilization or of being grafted
gracious disposed to bestow favors; "thanks to the gracious gods"
hospitable favorable to life and growth; "soil sufficiently hospitable for forest growth"; "a hospitable environment"
sociable friendly and pleasant; "a sociable gathering"
social marked by friendly companionship with others; "a social cup of coffee"
warm of a seeker; near to the object sought; "you're getting warm"; "hot on the trail"
affable,
amiable,
cordial,
genial diffusing warmth and friendliness; "an affable smile"; "an amiable gathering"; "cordial relations"; "a cordial greeting"; "a genial host"
matey,
pally,
palsy-walsy,
chummy (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"
companionate like a companion; "companionate marriage"; "a companionate dog"
