The Collaborative International Dictionary of English v.0.48:

Favor \Fa"vor\, v. t. [imp. & p. p. Favored (f[=a]"v[~e]rd);
   p. pr. & vb. n. Favoring.] [Written also favour.] [Cf. OF.
   favorer, favorir. See Favor, n.]
   1. To regard with kindness; to support; to aid, or to have
      the disposition to aid, or to wish success to; to be
      propitious to; to treat with consideration or tenderness;
      to show partiality or unfair bias towards.
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            O happy youth! and favored of the skies. --Pope.
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            He that favoreth Joab, . . . let him go after Joab.
                                                  --2 Sam. xx.
                                                  11.
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            [The painter] has favored her squint admirably.
                                                  --Swift.
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   2. To afford advantages for success to; to facilitate; as, a
      weak place favored the entrance of the enemy.
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   3. To resemble in features; to have the aspect or looks of;
      as, the child favors his father.
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            The porter owned that the gentleman favored his
            master.                               --Spectator.
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The Collaborative International Dictionary of English v.0.48:

Favoring \Fa"vor*ing\, a.
   That favors. -- Fa"vor*ing*ly, adv.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "favoring":
   advantageous, advocating, agential, agentival, agentive, alike,
   aped, approving, assisting, auspicious, backing, beneficial,
   benign, benignant, better, brave, bright, conducive, consimilar,
   copied, counterfeit, employable, ersatz, facilitating, fair, fake,
   favorable, favored, following, fortunate, forwarding,
   full of promise, golden, good, handy, happy, helpful, homogeneous,
   identical, imitated, imitation, instrumental, intermediary, like,
   lucky, mediating, mediatorial, mimicked, ministerial, ministering,
   mock, more desirable, nearly reproduced, not unlike, of choice,
   of good omen, of happy portent, of promise, phony, preferable,
   preferential, preferred, preferring, pro, promising, promoting,
   propitious, prosperous, resembling, simulated, smacking of,
   something like, subservient, suggestive of, supporting, synthetic,
   to be preferred, toward, uniform with, use, useful, well-disposed,
   well-inclined