firebrick

• POS: Noun
• HYPHEN: fire=brick

CIDE DICTIONARY

firebrick, n. 

 a brick made of fire clay, used for lining e.g. furnaces and chimneys.  [WordNet 1.5]

THESAURUS

firebrick

adobe, ashlar, biscuit, bisque, bowl, brick, bricks and mortar, cement, ceramic ware, ceramics, china, clinker, concrete, covering materials, crock, crockery, enamelware, ferroconcrete, flag, flagstone, flooring, glass, jug, lath and plaster, masonry, mortar, pavement, paving, paving material, plasters, porcelain, pot, pottery, prestressed concrete, refractory, roofage, roofing, siding, stone, tile, tiling, urn, vase, walling