[1] : The Collaborative International Dictionary of English v.0.48

survival \surviv"al\, n. from survive.
   1. a living or continuing longer than, or beyond the
      existence of, another person, thing, or event; an
      outliving.
      1913 webster

   2. arhaeol.  ethnol. any habit, usage, or belief,
      remaining from ancient times, the origin of which is often
      unknown, or imperfectly known.
      1913 webster

            the close bearing of the doctrine of survival on the
            study of manners and customs.         --tylor.
      1913 webster

   survival of the fittest. biol. see natural selection,
      under natural.
      1913 webster survivance
see also:
survive survival of the fittest natural selection natural 

[2] : WordNet (r) 2.0

survival
     n 1: a state of surviving; remaining alive syn: endurance
     2: a natural process resulting in the evolution of organisms
        best adapted to the environment syn: survival of the
        fittest, natural selection, selection
     3: something that survives
see also:
endurance survival of the fittest natural selection selection 

[3] : Moby Thesaurus II by Grady Ward, 1.0

91 moby thesaurus words for "survival":
   abidingness, afterglow, afterimage, age, ancient manuscript,
   antique, antiquity, archaism, artifact, balance, butt, butt end,
   candle ends, cave painting, chaff, constancy, continuance, debris,
   defeat of time, defiance of time, detritus, diuturnity, durability,
   durableness, duration, end, endurance, eolith, fag end, filings,
   fossil, holdover, husks, lastingness, leavings, leftovers,
   long standing, long-lastingness, long-livedness, longevity,
   maintenance, mezzolith, microlith, neolith, odds and ends,
   offscourings, orts, paleolith, parings, perdurability, perennation,
   permanence, perpetuity, persistence, petrification,
   petrified forest, petrified wood, petroglyph, plateaulith, rags,
   refuse, relic, relics, reliquiae, remainder, remains, remnant,
   residue, residuum, rest, roach, rubbish, ruin, ruins, rump,
   sawdust, scourings, scraps, shadow, shavings, stability, standing,
   steadfastness, straw, stubble, stump, survivance, sweepings, trace,
   vestige, waste

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