The Collaborative International Dictionary of English v.0.48:

Stimulate \Stim"u*late\, v. t. [imp. & p. p. Stimulated; p.
   pr. & vb. n. Stimulating.] [L. stimulatus, p. p. of
   stimulare to prick or goad on, to incite, fr. stimulus a
   goad. See Stimulus.]
   1. To excite as if with a goad; to excite, rouse, or animate,
      to action or more vigorous exertion by some pungent motive
      or by persuasion; as, to stimulate one by the hope of
      reward, or by the prospect of glory.
      [1913 Webster]

            To excite and stimulate us thereunto. --Dr. J.
                                                  Scott.
      [1913 Webster]

   2. (Physiol.) To excite; to irritate; especially, to excite
      the activity of (a nerve or an irritable muscle), as by
      electricity.
      [1913 Webster]

   Syn: To animate; incite; encourage; impel; urge; instigate;
        irritate; exasperate; incense.
        [1913 Webster]

WordNet (r) 3.0 (2006):

stimulated
    adj 1: emotionally aroused [syn: stimulated, stirred,
           stirred up, aroused]

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "stimulated":
   actuated, agog, animated, aquiver, aroused, atingle, atwitter,
   bursting, carried away, ebullient, effervescent, energized,
   excited, exhilarated, fired, high, hopped up, impassioned,
   impelled, inclined, inflamed, inner-directed, invigorated,
   keyed up, lathered up, manic, minded, motivated, moved,
   other-directed, prompted, ready to burst, reanimated, recharged,
   recreated, refreshed, renewed, revived, roused, steamed up,
   stirred, stirred up, thrilled, tingling, tingly, turned-on,
   whipped up, worked up, wrought up, yeasty