vulcanize

To change the properties of, as caoutchouc, or India rubber, by the process of vulcanization. Vulcanized fiber, paper, paper pulp, or other fiber, chemically treated, as with metallic chlorides, so as to form a substance resembling ebonite in texture, hardness, etc. Knight. -- Vulcanized rubber, India rubber, vulcanized.

Source: Webster's Revised Unabridged Dictionary (1913), United States public domain. See methodology for full licensing detail. Word validity for game play may differ from any official game dictionary.