兵戈[heika] swords
干戈[kanka] shield and halberd
戈を収める[hokowoosameru] to sheathe one's sword
干戈を交える[kankawomajieru] to open hostilities

戈構え[hokogamae] kanji "spear" radical at right
戈旁[hokozukuri] kanji "spear" radical at right
銅戈[douka] bronze dagger-axe

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