Ganister, also known as firestone, is a type of rock that is commonly used in furnace linings and the fabrication of refractory materials. If you're looking for synonyms for the word "ganister," there are a few options. These include bauxite, corundum, quartz, limestone, and dolomite. Each of these materials is similar in texture and uses, making them useful as substitutes for ganister in certain applications. For example, bauxite and corundum are both highly durable and heat-resistant, making them excellent options for use in blast furnaces and other high-temperature applications. Limestone and dolomite, on the other hand, are more commonly used in traditional building materials.