mate B2

/meɪt/ A friend.

mateship C2+

/ˈmeɪtʃɪp/ camaraderie and loyalty between friends, especially in Australian usage

matey C2+

/ˈmeɪti/ friendly and sociable; (British) a familiar term of address

helpmate C2+

/ˈhɛlpˌmeɪt/ a companion and helper, especially a spouse