The Collaborative International Dictionary of English v.0.48:

Solace \Sol"ace\, v. t. [imp. & p. p. Solaced; p. pr. & vb. n.
   Solacing.] [OF. solacier, soulacier, F. solacier, LL.
   solatiare. See Solace, n.]
   1. To cheer in grief or under calamity; to comfort; to
      relieve in affliction, solitude, or discomfort; to
      console; -- applied to persons; as, to solace one with the
      hope of future reward.
      [1913 Webster]

   2. To allay; to assuage; to soothe; as, to solace grief.
      [1913 Webster]

   Syn: To comfort; assuage; allay. See Comfort.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Solace \Sol"ace\, n. [OF. solas, ssoulaz, L. solacium, solatium,
   fr. solari to comfort, console. Cf. Console, v. t.]
   1. Comfort in grief; alleviation of grief or anxiety; also,
      that which relieves in distress; that which cheers or
      consoles; relief.
      [1913 Webster]

            In business of mirth and of solace.   --Chaucer.
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            The proper solaces of age are not music and
            compliments, but wisdom and devotion. --Rambler.
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   2. Rest; relaxation; ease. [Obs.]
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            To make his steed some solace.        --Chaucer.
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   Syn: Comfort; consolation; alleviation; relief.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Solace \Sol"ace\, v. i.
   To take comfort; to be cheered. --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

solace
    n 1: the comfort you feel when consoled in times of
         disappointment; "second place was no consolation to him"
         [syn: consolation, solace, solacement]
    2: comfort in disappointment or misery [syn: solace,
       solacement]
    3: the act of consoling; giving relief in affliction; "his
       presence was a consolation to her" [syn: consolation,
       comfort, solace]
    v 1: give moral or emotional strength to [syn: comfort,
         soothe, console, solace]

Moby Thesaurus II by Grady Ward, 1.0:

75 Moby Thesaurus words for "solace":
   aid and comfort, allay, alleviate, ameliorate, amuse, amusement,
   assuage, assurance, assure, balm, bear up, beguile, buck up, cheer,
   cheer up, comfort, condole, condole with, condolence, consolation,
   console, convulse, delight, diversion, divert, divertisement,
   divertissement, ease, easement, encourage, encouragement,
   enjoyment, enliven, entertain, entertainment, exhilarate,
   fracture one, give comfort, hearten, help, kill, knock dead,
   loosen up, mirth, mitigate, passe-temps, pastime, pleasure,
   put at ease, raise a laugh, raise a smile, reassurance, reassure,
   recreate, recreation, refresh, regale, regalement, relax,
   relaxation, relief, relieve, set at ease, shred of comfort, slay,
   solacement, soothe, succor, support, sympathize with, sympathy,
   tickle, titillate, upraise, wow