伴天連[bateren] Portuguese Jesuits (in Japan in the 16th century)
相伴う[aitomonau] to accompany
同伴[douhan] to accompany
同伴者[douhansha] companion
伴なう[tomonau] to accompany

伴食[banshoku] eating with a guest
伴僧[bansou] priests assisting at a Buddhist service
伴奏[bansou] (musical) accompaniment
伴奏部[bansoubu] accompaniment