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

favor \fa"vor\ f=a"v~er, n. written also favour. of.
   favor, f. faveur, l. favor, fr. favere to be favorable, cf.
   skr. bh=avaya to further, foster, causative of bh=u to
   become, be. cf. be. in the phrase to curry favor, favor is
   prob. for favel a horse. see 2d favel.
   1. kind regard; propitious aspect; countenance; friendly
      disposition; kindness; good will.
      1913 webster

            hath crawled into the favor of the king. --shak.
      1913 webster

   2. the act of countenancing, or the condition of being
      countenanced, or regarded propitiously; support;
      promotion; befriending.
      1913 webster

            but found no favor in his lady's eyes. --dryden.
      1913 webster

            and jesus increased in wisdom and stature, and in
            favor with god and man.               --luke ii. 52.
      1913 webster

   3. a kind act or office; kindness done or granted;
      benevolence shown by word or deed; an act of grace or good
      will, as distinct from justice or remuneration.
      1913 webster

            beg one favor at thy gracious hand.   --shak.
      1913 webster

   4. mildness or mitigation of punishment; lenity.
      1913 webster

            i could not discover the lenity and favor of this
            sentence.                             --swift.
      1913 webster

   5. the object of regard; person or thing favored.
      1913 webster

            all these his wondrous works, but chiefly man,
            his chief delight and favor.          --milton.
      1913 webster

   6. a gift or present; something bestowed as an evidence of
      good will; a token of love; a knot of ribbons; something
      worn as a token of affection; as, a marriage favor is a
      bunch or knot of white ribbons or white flowers worn at a
      wedding.
      1913 webster

            wear thou this favor for me, and stick it in thy
            cap.                                  --shak.
      1913 webster

   7. appearance; look; countenance; face. obs.
      1913 webster

            this boy is fair, of female favor.    --shak.
      1913 webster

   8. law partiality; bias. --bouvier.
      1913 webster

   9. a letter or epistle; -- so called in civility or
      compliment; as, your favor of yesterday is received.
      1913 webster

   10. pl. love locks. obs. --wright.
       1913 webster

   challenge to the favor or challenge for favor law, the
      challenge of a juror on grounds not sufficient to
      constitute a principal challenge, but sufficient to give
      rise to a probable suspicion of favor or bias, such as
      acquaintance, business relation, etc. see principal
      challenge, under challenge.

   in favor of, upon the side of; favorable to; for the
      advantage of.

   in favor with, favored, countenanced, or encouraged by.

   to curry favor see the etymology of favor, above, to
      seek to gain favor by flattery, caresses, kindness, or
      officious civilities.

   with one's favor, or by one's favor, with leave; by kind
      permission.
      1913 webster

            but, with your favor, i will treat it here.
                                                  --dryden.

   syn: kindness; countenance; patronage; support; lenity;
        grace; gift; present; benefit.
        1913 webster
see also:
be favel challenge to the favor challenge for favor principal challenge challenge 
in favor of in favor with to curry favor favor with one's favor 
by one's favor 

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

18 moby thesaurus words for "in favor of":
   advocating, all for, approving, backing, favorable, favoring, for,
   in aid of, in behalf of, in furtherance of, on account of,
   on behalf of, pro, remedial of, supporting, well-disposed,
   well-inclined, with

Favor >> F Words
Favor, definition of term: Favor
favor_pag1.html

In Favor Of >> I Words
In Favor Of, definition of term: In Favor Of
in+favor+of_pag1.html