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

これと同じ[koretoonaji] the same as this
と同じ様に[toonajiyouni] in the same way as
安定同位体[anteidouitai] stable isotope
異句同音[ikudouon] in concert
異口同音に[ikudouonni] in one voice

異同[idou] difference
一口同音[ikkudouon] reading in unison
一視同仁[isshidoujin] loving every human being with impartiality
一心同体[isshindoutai] being one in body and soul
一同[ichidou] all present