The Collaborative International Dictionary of English v.0.48:

Enchantress \En*chant"ress\, n. [Cf. F. enchanteresse.]
   A woman versed in magical arts; a sorceress; also, a woman
   who fascinates. --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

enchantress
    n 1: a woman who is considered to be dangerously seductive [syn:
         enchantress, temptress, siren, Delilah, femme
         fatale]
    2: a female sorcerer or magician [syn: enchantress, witch]

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "enchantress":
   Circe, Don Juan, Euryale, Gorgon, Lorelei, Medea, Medusa,
   Miss America, Parthenope, Siren, Stheno, bathing beauty,
   beau ideal, beaut, beauty, beauty contest winner, beauty queen,
   belle, bewitcher, bunny, charmer, coquette, cover girl, dazzler,
   dream, enchanter, enticer, femme fatale, flirt, great beauty, hag,
   hex, inveigler, knockout, lady fair, lamia, looker, model, paragon,
   peach, pinup, pinup girl, pussycat, raving beauty, reigning beauty,
   seducer, seductress, sex kitten, siren, slick chick, sorceress,
   spellbinder, stunner, teaser, tempter, temptress, vamp, vampire,
   witchwoman