Source : WordNet®

powderize
     v 1: become powder or dust; "When it was blown up, the building
          powderized" [syn: {pulverize}, {pulverise}, {powderise}]
     2: make into a powder by breaking up or cause to become dust;
        "pulverize the grains" [syn: {powderise}, {powder}, {pulverize},
         {pulverise}]