The Collaborative International Dictionary of English v.0.48:

Turn \Turn\ (t[^u]rn), v. i.
   1. To move round; to have a circular motion; to revolve
      entirely, repeatedly, or partially; to change position, so
      as to face differently; to whirl or wheel round; as, a
      wheel turns on its axis; a spindle turns on a pivot; a man
      turns on his heel.
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            The gate . . . on golden hinges turning. --Milton.
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   2. Hence, to revolve as if upon a point of support; to hinge;
      to depend; as, the decision turns on a single fact.
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            Conditions of peace certainly turn upon events of
            war.                                  --Swift.
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   3. To result or terminate; to come about; to eventuate; to
      issue.
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            If we repent seriously, submit contentedly, and
            serve him faithfully, afflictions shall turn to our
            advantage.                            --Wake.
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   4. To be deflected; to take a different direction or
      tendency; to be directed otherwise; to be differently
      applied; to be transferred; as, to turn from the road.
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            Turn from thy fierce wrath.           --Ex. xxxii.
                                                  12.
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            Turn ye, turn ye from your evil ways. --Ezek.
                                                  xxxiii. 11.
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            The understanding turns inward on itself, and
            reflects on its own operations.       --Locke.
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   5. To be changed, altered, or transformed; to become
      transmuted; also, to become by a change or changes; to
      grow; as, wood turns to stone; water turns to ice; one
      color turns to another; to turn Muslim.
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            I hope you have no intent to turn husband. --Shak.
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            Cygnets from gray turn white.         --Bacon.
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   6. To undergo the process of turning on a lathe; as, ivory
      turns well.
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   7. Specifically:
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      (a) To become acid; to sour; -- said of milk, ale, etc.
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      (b) To become giddy; -- said of the head or brain.
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                I'll look no more;
                Lest my brain turn.               --Shak.
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      (c) To be nauseated; -- said of the stomach.
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      (d) To become inclined in the other direction; -- said of
          scales.
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      (e) To change from ebb to flow, or from flow to ebb; --
          said of the tide.
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      (f) (Obstetrics) To bring down the feet of a child in the
          womb, in order to facilitate delivery.
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   8. (Print.) To invert a type of the same thickness, as
      temporary substitute for any sort which is exhausted.
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   To turn about, to face to another quarter; to turn around.


   To turn again, to come back after going; to return. --Shak.

   To turn against, to become unfriendly or hostile to.

   To turn aside or To turn away.
      (a) To turn from the direct course; to withdraw from a
          company; to deviate.
      (b) To depart; to remove.
      (c) To avert one's face.

   To turn back, to turn so as to go in an opposite direction;
      to retrace one's steps.

   To turn in.
      (a) To bend inward.
      (b) To enter for lodgings or entertainment.
      (c) To go to bed. [Colloq.]

   To turn into, to enter by making a turn; as, to turn into a
      side street.

   To turn off, to be diverted; to deviate from a course; as,
      the road turns off to the left.

   To turn on or To turn upon.
      (a) To turn against; to confront in hostility or anger.
      (b) To reply to or retort.
      (c) To depend on; as, the result turns on one condition.


   To turn out.
      (a) To move from its place, as a bone.
      (b) To bend or point outward; as, his toes turn out.
      (c) To rise from bed. [Colloq.]
      (d) To come abroad; to appear; as, not many turned out to
          the fire.
      (e) To prove in the result; to issue; to result; as, the
          crops turned out poorly.

   To turn over, to turn from side to side; to roll; to
      tumble.

   To turn round.
      (a) To change position so as to face in another direction.
      (b) To change one's opinion; to change from one view or
          party to another.

   To turn to, to apply one's self to; to have recourse to; to
      refer to. "Helvicus's tables may be turned to on all
      occasions." --Locke.

   To turn to account, profit, advantage, or the like, to
      be made profitable or advantageous; to become worth the
      while.

   To turn under, to bend, or be folded, downward or under.

   To turn up.
      (a) To bend, or be doubled, upward.
      (b) To appear; to come to light; to transpire; to occur;
          to happen.
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The Collaborative International Dictionary of English v.0.48:

Advantage \Ad*van"tage\ (?; 61, 48), n. [OE. avantage,
   avauntage, F. avantage, fr. avant before. See Advance, and
   cf. Vantage.]
   1. Any condition, circumstance, opportunity, or means,
      particularly favorable to success, or to any desired end;
      benefit; as, the enemy had the advantage of a more
      elevated position.
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            Give me advantage of some brief discourse. --Shak.
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            The advantages of a close alliance.   --Macaulay.
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   2. Superiority; mastery; -- with of or over.
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            Lest Satan should get an advantage of us. --2 Cor.
                                                  ii. 11.
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   3. Superiority of state, or that which gives it; benefit;
      gain; profit; as, the advantage of a good constitution.
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   4. Interest of money; increase; overplus (as the thirteenth
      in the baker's dozen). [Obs.]
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            And with advantage means to pay thy love. --Shak.
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   5. (Tennis) The first point scored after deuce.
      [PJC]

   Advantage ground, vantage ground. [R.] --Clarendon.

   To have the advantage of (any one), to have a personal
      knowledge of one who does not have a reciprocal knowledge.
      "You have the advantage of me; I don't remember ever to
      have had the honor." --Sheridan.

   To take advantage of, to profit by; (often used in a bad
      sense) to overreach, to outwit.
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   Syn: Advantage, Advantageous, Benefit, Beneficial.

   Usage: We speak of a thing as a benefit, or as beneficial,
          when it is simply productive of good; as, the benefits
          of early discipline; the beneficial effects of
          adversity. We speak of a thing as an advantage, or as
          advantageous, when it affords us the means of getting
          forward, and places us on a "vantage ground" for
          further effort. Hence, there is a difference between
          the benefits and the advantages of early education;
          between a beneficial and an advantageous investment of
          money.
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The Collaborative International Dictionary of English v.0.48:

Advantage \Ad*van"tage\, v. t. [imp. & p. p. Advantaged; p.
   pr. & vb. n. Advantaging.] [F. avantager, fr. avantage. See
   Advance.]
   To give an advantage to; to further; to promote; to benefit;
   to profit.
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         The truth is, the archbishop's own stiffness and
         averseness to comply with the court designs, advantaged
         his adversaries against him.             --Fuller.
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         What is a man advantaged, if he gain the whole world,
         and lose himself, or be cast away?       --Luke ix. 25.
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   To advantage one's self of, to avail one's self of. [Obs.]
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WordNet (r) 3.0 (2006):

advantage
    n 1: the quality of having a superior or more favorable
         position; "the experience gave him the advantage over me"
         [syn: advantage, vantage] [ant: disadvantage]
    2: (tennis) first point scored after deuce
    3: benefit resulting from some event or action; "it turned out
       to my advantage"; "reaping the rewards of generosity" [syn:
       advantage, reward] [ant: penalty]
    v 1: give an advantage to; "This system advantages the rich"
         [ant: disadvantage, disfavor, disfavour]

Moby Thesaurus II by Grady Ward, 1.0:

151 Moby Thesaurus words for "advantage":
   accommodation, account, advance, advancement, advantageously,
   advantageousness, advisability, allowance, amenity, answer,
   appliance, applicability, appropriateness, appurtenance,
   ascendancy, asset, avail, be handy, be of use, be right, befit,
   befitting, behalf, behoof, benediction, beneficialness, benefit,
   benison, bestead, better, betterment, blessing, boon, boost,
   break no bones, bulge, coign of vantage, conduce to, contribute to,
   convenience, deadwood, decency, desirability, do, do good,
   do no harm, do the trick, dominance, domination, draw, drop, edge,
   encourage, enhancement, expedience, expediency, expedite,
   facilitate, facility, favor, feasibility, fill the bill, fit,
   fitness, fittingness, flying start, foothold, footing, forward,
   fruitfulness, further, gain, give good returns, godsend, good,
   handicap, hasten, head start, heightening, help, hold, improvement,
   inside track, interest, jump, lead, leadership, lend wings to,
   make for, mastery, not come amiss, odds, opportuneness, overhand,
   pay, pay off, percentage, point, politicness, profit,
   profitability, promote, propriety, prosperity, prudence, purchase,
   push forward, put forward, quicken, relevance, rightness,
   running start, seasonableness, seemliness, serve,
   serve the purpose, service, serviceability, set forward,
   something extra, something in reserve, speed, start, suffice,
   suit the occasion, suitability, superiority, sway, timeliness,
   to advantage, toehold, traction, upper hand, use, usefulness,
   utility, value, vantage, vantage ground, vantage point, victory,
   welfare, well-being, whip hand, wisdom, work, work for,
   world of good, worth, worthwhileness, yield a profit