fireproof

from WordNet (r) 3.0 (2006)

fireproof
    adj 1: impervious to damage by fire
    v 1: make resistant to fire

from The Collaborative International Dictionary of English v.0.48

Fireproof \Fire"proof`\, a.
   Proof against fire; incombustible.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

32 Moby Thesaurus words for "fireproof":
      airtight, ballproof, bombproof, bulletproof, burglarproof,
      corrosionproof, dampproof, fire-resistant, fire-resisting,
      fire-retardant, fire-retarded, fireproofed, flameproof, foolproof,
      hermetic, holeproof, impervious to, insulate, leakproof,
      noiseproof, proof, proof against, punctureproof, resistant,
      rustproof, shatterproof, shellproof, soundproof, tight, waterproof,
      watertight, weatherproof