The Collaborative International Dictionary of English v.0.48:

Undestroyed \Undestroyed\
   See destroyed.

Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "undestroyed":
   abiding, bright, changeless, constant, continuing, durable,
   enduring, firm, fixed, fresh, frozen, harmless, immobile,
   immutable, intact, inviolate, lasting, mint, permanent, perpetual,
   persistent, pristine, quiescent, remaining, rigid, scatheless,
   solid, stable, static, stationary, staying, steadfast, sustained,
   torpid, unaltered, unbroken, unbruised, unchangeable, unchanged,
   unchanging, unchecked, undamaged, undefaced, undeformed,
   undemolished, unfaded, unfading, unfailing, unharmed, unhurt,
   unimpaired, uninjured, unmaimed, unmangled, unmarked, unmarred,
   unscarred, unscathed, unscratched, unshattered, unshifting,
   unspoiled, untorn, untouched, unvaried, unvarying, unwithered,
   unworn, virgin