The Collaborative International Dictionary of English v.0.48:

Lovable \Lov"a*ble\, a.
   Having qualities that excite, or are fitted to excite, love;
   worthy of love.
   [1913 Webster]

         Elaine the fair, Elaine the lovable,
         Elaine, the lily maid of Astolat.        --Tennyson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lovable
    adj 1: having characteristics that attract love or affection; "a
           mischievous but lovable child" [syn: lovable,
           loveable] [ant: hateful]

Moby Thesaurus II by Grady Ward, 1.0:

53 Moby Thesaurus words for "lovable":
   acceptable, admirable, adorable, affectionate, agreeable, alluring,
   angelic, appealing, appetizing, attractive, bewitching,
   captivating, caressable, charming, cherished, cuddlesome, cuddly,
   cute, darling, dear, desirable, enchanting, endearing, engaging,
   enthralling, entrancing, enviable, exciting, fetching, genial,
   kissable, likable, likeable, loveable, lovely, lovesome,
   mouth-watering, pleasing, provocative, ravishing, seductive,
   seraphic, sweet, taking, tantalizing, tempting, tender,
   to be desired, toothsome, unobjectionable, winning, winsome,
   worth having