invincibility

from WordNet (r) 3.0 (2006)

invincibility
    n 1: the property being difficult or impossible to defeat [syn:
         {indomitability}, {invincibility}]

from The Collaborative International Dictionary of English v.0.48

Invincibility \In*vin`ci*bil"i*ty\, n. [Cf. F.
   invincibilit['e].]
   The quality or state of being invincible; invincibleness.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

41 Moby Thesaurus words for "invincibility":
      authenticity, authoritativeness, calculability, deathlessness,
      dependability, faithworthiness, firmness, immortality,
      impenetrability, imperishability, impregnability, incorruptibility,
      indelibility, indestructibility, indomitability, ineffaceability,
      ineradicability, inerasableness, inexpugnability, insuperability,
      inviolability, invulnerability, irresistibility, predictability,
      reliability, secureness, security, solidity, soundness, stability,
      staunchness, steadfastness, steadiness, substantiality,
      trustworthiness, unassailability, unattackableness, unbeatableness,
      unconquerableness, unerringness, validity

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