青銅[seidou] bronze
青銅器時代[seidoukijidai] Bronze Age
青銅色[seidoushoku] bronze
銅メダル[doumedaru] bronze medal
銅貨[douka] copper coin

銅山[douzan] copper mine
銅線[dousen] copper line
銅像[douzou] bronze statue
銅箔[douhaku] copper foil (used in copper plating)
銅版画[douhanga] copperplate engraving

管鑰[kanyaku] key