塵入[gomiire] trashcan
塵箱[gomibako] garbage can
黄塵[koujin] dust (in air)
灰塵[haijin] ashes and dust
含塵率[ganjinritsu] dust content

吸塵[kyuujin] dust vacuuming
後塵[koujin] second fiddle
市塵[shijin] city dust
塵芥[jinkai] rubbish

麹菌[koujikin] yeast plant
麹黴[koujikabi] yeast plant
米麹[komekouji] rice-malt
黒麹菌[kurokoujikin] Aspergillus niger
白麹菌[shirokoujikin] Aspergillus kawachii

麹酸[koujisan] kojic acid
塩麹[shiokouji] traditional Japanese condiment made by fermenting kouji mold with salt and water
麹漬[koujizuke] fish, meat, vegetables, etc. pickled in mould (mold) and salt
麦麹[mugikouji] barley koji