The Collaborative International Dictionary of English v.0.48:

Compassionate \Com*pas"sion*ate\, a.
   1. Having a temper or disposition to pity; sympathetic;
      merciful.
      [1913 Webster]

            There never was any heart truly great and generous,
            that was not also tender and compassionate. --South.
      [1913 Webster]

   2. Complaining; inviting pity; pitiable. [R.] --Shak.

   Syn: Sympathizing; tender; merciful; pitiful.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Compassionate \Com*pas"sion*ate\, v. t. [imp. & p. p.
   Compassionated; p. pr. & vb. n. Compassionating.]
   To have compassion for; to pity; to commiserate; to
   sympathize with.
   [1913 Webster]

         Compassionates my pains, and pities me.  --Addison.
   [1913 Webster]

WordNet (r) 3.0 (2006):

compassionate
    adj 1: showing or having compassion; "heard the soft and
           compassionate voices of women" [ant: uncompassionate]
    v 1: share the suffering of [syn: feel for, pity,
         compassionate, condole with, sympathize with]

Moby Thesaurus II by Grady Ward, 1.0:

64 Moby Thesaurus words for "compassionate":
   Christian, Christlike, Christly, accepting, ache, affectionate,
   benign, benignant, bleeding, brotherly, charitable, clement,
   commiserate, commiserative, condolent, decent, deplore, easy,
   easygoing, feel for, forbearant, forbearing, forgiving, fraternal,
   gentle, good, gracious, grieve over, human, humane, kind,
   kindhearted, kindly, kindly-disposed, lament, lax, lenient, loving,
   melting, merciful, mild, moderate, mourn, nice, patient, piteous,
   pitiful, pity, pitying, regret, repine, responsive, ruthful, soft,
   softhearted, sympathetic, sympathize with, sympathizing, tender,
   tenderhearted, tolerant, understanding, warm, warmhearted