The Collaborative International Dictionary of English v.0.48:

Resource \Re*source"\ (r?*s?rs"), n. [F. ressource, fr. OF.
   ressourdre, resourdre, to spring forth or up again; pref. re-
   re- + sourdre to spring forth. See Source.]
   1. That to which one resorts orr on which one depends for
      supply or support; means of overcoming a difficulty;
      resort; expedient.
      [1913 Webster]

            Threat'nings mixed with prayers, his last resource.
                                                  --Dryden.
      [1913 Webster]

   2. pl. Pecuniary means; funds; money, or any property that
      can be converted into supplies; available means or
      capabilities of any kind.
      [1913 Webster]

            Scotland by no means escaped the fate ordained for
            every country which is connected, but not
            incorporated, with another country of greater
            resources.                            --Macaulay.
      [1913 Webster]

   Syn: Expedient; resort; means; contrivance.
        [1913 Webster]

WordNet (r) 3.0 (2006):

resource
    n 1: available source of wealth; a new or reserve supply that
         can be drawn upon when needed
    2: a source of aid or support that may be drawn upon when
       needed; "the local library is a valuable resource"
    3: the ability to deal resourcefully with unusual problems; "a
       man of resource" [syn: resource, resourcefulness,
       imagination]

Moby Thesaurus II by Grady Ward, 1.0:

188 Moby Thesaurus words for "resource":
   ability, action, ad hoc measure, address, adeptness, adroitness,
   airmanship, answer, aptitude, artfulness, artifice, artisanship,
   artistry, assets, available means, backlog, balance, bonanza,
   bravura, brilliance, cache, capability, capacity, capital,
   capital goods, capitalization, cash, cleverness, command,
   competence, contraption, contrivance, control, coordination,
   cornucopia, countermove, coup, course of action, craft,
   craftsmanship, creation, cunning, deftness, demarche,
   dernier ressort, device, dexterity, dexterousness, dextrousness,
   diplomacy, dodge, efficiency, effort, expediency, expedient,
   expertise, facility, fashion, finesse, font, forte, fortune, fount,
   fountain, fund, funds, gimmick, gold mine, grace, grip, grist,
   gumption, guts, handiness, holdings, hope, horsemanship,
   imagination, imaginativeness, improvisation, ingeniousness,
   ingenuity, initiative, invention, inventiveness, jury-rig,
   jury-rigged expedient, know-how, last expedient, last resort,
   last shift, liquid assets, lode, makeshift, maneuver, manner,
   marksmanship, mastership, mastery, mean, means, measure, method,
   mine, mode, money, move, nest egg, opportunity, pis aller,
   possessions, possibility, practical ability, proficiency, property,
   prowess, quality, quarry, quick-wittedness, quickness, readiness,
   recourse, refuge, relief, reserve, reserve fund, reserve supply,
   reserves, reservoir, resort, resourcefulness, resources, riches,
   savings, savoir-faire, savvy, seamanship, shake-up, shift,
   sinking fund, skill, skillfulness, solution, something in reserve,
   source, source of supply, spring, staple, step, stockpile, stopgap,
   stratagem, strength, string, stroke, stroke of policy, style,
   substance, substitute, subterfuge, supply, surrogate, system, tact,
   tactfulness, tactic, talent, technical brilliance,
   technical mastery, technical skill, technique, temporary expedient,
   timing, trick, trump, unexpended balance, vein, virtuosity, way,
   wealth, well, wellspring, wit, wizardry, working hypothesis,
   working proposition, workmanship, worth