A good friend; a comrade, A partner, especially one of a pair or team associated under the buddy system, A partner for a particular activity

A friend; a chum, Partner; mate; chum; accomplice, colloquial A friend, buddy, mate, cobber, someone to hang around with, verb_ Be friends with, hang around with, become friends; act friendly towards, intransitive verb_ To associate as friends or chums. Often used with around