WordNet (r) 3.0 (2006):

empathetic
    adj 1: showing empathy or ready comprehension of others' states;
           "a sensitive and empathetic school counselor" [syn:
           empathic, empathetic]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "empathetic":
   accordant, agreeable, agreeing, akin, allergic, amicable,
   anaphylactic, at one, attuned, compatible, concordant, congenial,
   corresponding, delicate, empathic, en rapport, frictionless, goosy,
   harmonious, hyperesthetic, hyperpathic, hypersensitive, in accord,
   in concert, in rapport, in tune, inharmony, irritable, itchy,
   like-minded, nervous, of one mind, overrefined, oversensible,
   oversensitive, overtender, passible, peaceful, prickly, refined,
   responsive, sensitive, skittish, supersensitive, sympathetic,
   tactful, tender, tetchy, thin-skinned, ticklish, together, touchy,
   understanding, united