Answer: ebonite

AnswerCrossword Clue
EBONITEBlack variety of hard rubber.
ebonitea hard rubber
ebonitehard, readily cut and polished rubber, obtained by vulcanizing rubber with a large amount of sulfur, used in the manufacture of combs, buttons, and for electric insulation
EBONITEComb rubber
EBONITEElectrical insulation material
EBONITEHard rubber substance
EBONITEHard back rubber.
EBONITEHard black rubber.
EBONITECombs are made of it.
EBONITERubber for combs and buttons.
EBONITEHard black stone.
EBONITEBowling ball material
EBONITEBowling balls are made of it.
EBONITEVulcanite.
EBONITEHard rubber.
EBONITEBlack hard rubber.
EBONITEComb material
EBONITEHard rubber
EBONITECommon bowling ball material
EBONITEInelastic rubber
EBONITEVulcanized rubber
EBONITEHard black rubber