The Collaborative International Dictionary of English v.0.48:

Endure \En*dure"\, v. i. [imp. & p. p. Endured; p. pr. & vb.
   n. Enduring.] [F. endurer; pref. en- (L. in) + durer to
   last. See Dure, v. i., and cf. Indurate.]
   1. To continue in the same state without perishing; to last;
      to remain.
      [1913 Webster]

            Their verdure still endure.           --Shak.
      [1913 Webster]

            He shall hold it [his house] fast, but it shall not
            endure.                               --Job viii.
                                                  15.
      [1913 Webster]

   2. To remain firm, as under trial or suffering; to suffer
      patiently or without yielding; to bear up under adversity;
      to hold out.
      [1913 Webster]

            Can thine heart endure, or can thine hands be strong
            in the days that I shall deal with thee? --Ezek.
                                                  xxii. 14.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Enduring \En*dur"ing\, a.
   Lasting; durable; long-suffering; as, an enduring
   disposition. "A better and enduring substance." --Heb. x. 34.
   -- En*dur"ing*ly, adv. --T. Arnold. -- En*dur"ing*ness,
   n.

WordNet (r) 3.0 (2006):

enduring
    adj 1: unceasing; "an abiding belief"; "imperishable truths"
           [syn: abiding, enduring, imperishable]
    2: patiently bearing continual wrongs or trouble; "an enduring
       disposition"; "a long-suffering and uncomplaining wife" [syn:
       enduring, long-suffering]

Moby Thesaurus II by Grady Ward, 1.0:

166 Moby Thesaurus words for "enduring":
   Spartan, abiding, accepting, adamantine, age-long, aged, alive,
   ancient, antique, armed with patience, assiduous, bulky,
   changeless, chronic, constant, continuing, dense, diligent,
   disciplined, diuturnal, dogged, durable, eidetic, endurant,
   eternal, evergreen, faithful, firm, fixed, forbearing, fresh,
   frozen, green, hard, hardy, heavy, immobile, immortal, immutable,
   inalterable, indefatigable, indomitable, indulgent, industrious,
   insistent, intact, intransient, inveterate, invincible, inviolate,
   kept in remembrance, lasting, lenient, long-lasting, long-lived,
   long-standing, long-suffering, long-term, longanimous, longeval,
   longevous, loyal, macrobiotic, massive, never-tiring, obstinate,
   of long duration, of long standing, patient, patient as Job,
   perdurable, perduring, perennial, permanent, perpetual,
   perseverant, persevering, persistent, persisting, pertinacious,
   philosophical, plodding, plugging, preoccupied, quiescent, rapt,
   recalled, recollected, relentless, remaining, remembered, resolute,
   retained, rigid, rugged, sedulous, self-controlled, sempervirent,
   single-minded, sleepless, slogging, solid, sound, stable, static,
   stationary, staying, steadfast, steady, stoic, stout, strong,
   stubborn, sturdy, sustained, tenacious, tireless, tolerant,
   tolerating, tolerative, torpid, tough, unabating, unaltered,
   unchangeable, unchanged, unchanging, unchecked, unconquerable,
   undaunted, understanding, undestroyed, undiscouraged, undrooping,
   unfading, unfailing, unfaltering, unflagging, unflinching,
   unforgotten, unintermitting, uninterrupted, unnodding, unrelaxing,
   unrelenting, unremitting, unshifting, unsleeping, unswerving,
   untiring, unvaried, unvarying, unwavering, unwearied, unwearying,
   unwinking, unyielding, utterly attentive, vital, vivid, weariless,
   well-built, well-constructed, well-founded, well-grounded,
   well-made