1. vitreous

adjective. ['ˈvɪtriːəs'] (of ceramics) having the surface made shiny and nonporous by fusing a vitreous solution to it.

Rhymes with Vitreous Silica

• basilica

2. silica

noun. ['ˈsɪləkə, ˈsɪlɪkə'] a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite.