WordNet (r) 3.0 (2006):

Circe
    n 1: (Greek mythology) a sorceress who detained Odysseus on her
         island and turned his men into swine

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "Circe":
   Don Juan, Euryale, Gorgon, Lorelei, Medea, Medusa, Parthenope,
   Siren, Stheno, bewitcher, charmer, coquette, enchanter,
   enchantress, enticer, femme fatale, flirt, inveigler, seducer,
   seductress, siren, spellbinder, teaser, tempter, temptress, vamp,
   vampire