The Collaborative International Dictionary of English v.0.48:

Tender-hearted \Ten"der-heart`ed\, a.
   Having great sensibility; susceptible of impressions or
   influence; affectionate; pitying; sensitive. --
   Ten"der-heart`ed*ly, adv. -- Ten"der-heart`ed*ness, n.
   [1913 Webster]

         Rehoboam was young and tender-hearted, and could not
         withstand them.                          --2 Chron.
                                                  xiii. 7.
   [1913 Webster]

         Be ye kind one to another, tender-hearted. --Eph. iv.
                                                  32.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tenderhearted
    adj 1: easily moved to love
    2: easily moved by another's distress; "a noble tenderhearted
       creature who sympathizes with all the human race"-
       W.M.Thackeray

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "tenderhearted":
   Christian, Christlike, Christly, affectionate, benign, benignant,
   bleeding, brotherly, charitable, clement, commiserative,
   compassionate, condolent, decent, delicate, emotionable,
   forbearant, fraternal, gentle, good, gracious, human, humane,
   impressionable, kind, kindhearted, kindly, kindly-disposed,
   lenient, loving, melting, merciful, nice, passible, pitying,
   receptive, responsive, ruthful, sensible, sensitive, soft,
   softhearted, susceptible, sympathetic, sympathizing, tender,
   understanding, warm, warmhearted