Sheetrock
Sheet rock |ˈSHētˌräk ˈʃitˌrɑk | ▶noun trademark a plasterboard made of gypsum layered between sheets of heavy paper.
Sheet |rock |ˈʃiːtrɒk | ▶noun [ mass noun ] trademark, chiefly US a plasterboard made of gypsum layered between sheets of heavy paper.