Synonyms to refractory

adobe, ashlar, biscuit, bisque, bowl, brick, bricks and mortar, cement, ceramic ware, ceramics, china, clayey, clayish, clinker, concrete, covering materials, crock, crockery, earthy, enamelware, ferroconcrete, firebrick, flag, flagstone, flooring, glass, gumbo, jug, lath and plaster, loamy, marly, masonry, mortar, pavement, paving, paving material, plasters, porcelain, pot, pottery, prestressed concrete, roofage, roofing, siding, soily, stone, tile, tiling, urn, vase, walling, adversary, adversative, adverse, alien, antagonist, antagonistic, anti, antipathetic, antithetic, archenemy, assailant, bitter enemy, clashing, combatant, competitive, competitor, con, conflicting, contradictory, contrary, counter, cross, devil, disaccordant, dissentient, enemy, foe, foeman, fractious, hostile, inimical, negative, noncooperative, obstinate, open enemy, opponent, opposed, opposing, opposing party, opposite, opposite camp, oppositional, oppositive, oppugnant, overthwart, perverse, public enemy, recalcitrant, repugnant, rival, sworn enemy, the loyal opposition, the opposition, uncooperative, unfavorable