御祖母さん[obaasan] grandmother
お母[ofukuro] one's mother
御母さん[okaasan] mother
お母さま[okaasama] mother
異母[ibo] different mother

雲母[unmo] mica
義母[gibo] mother-in-law
空母[kuubo] aircraft carrier
継母[keibo] stepmother
賢母[kenbo] wise mother

酵素[kouso] enzyme
酵素学[kousogaku] enzymology
酵母[koubo] yeast
酵母菌[koubokin] yeast fungus
醗酵[hakkou] fermentation

発酵乳[hakkounyuu] yoghurt
発酵素[hakkouso] a ferment
アセトンブタノール発酵[asetonbutanooruhakkou] acetone-butanol fermentation
アポ酵素[apokouso] apoenzyme
アミノ酸発酵[aminosanhakkou] amino-acid fermentation

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