The Collaborative International Dictionary of English v.0.48:

Magnetism \Mag"net*ism\, n. [Cf. F. magn['e]tisme.]
   The property, quality, or state, of being magnetic; the
   manifestation of the force in nature which is seen in a
   magnet. At one time it was believed to be separate from the
   electrical force, but it is now known to be intimately
   associated with electricity, as part of the phenomenon of
   electromagnetism.
   [1913 Webster +PJC]

   2. The science which treats of magnetic phenomena.
      [1913 Webster]

   3. Power of attraction; power to excite the feelings and to
      gain the affections. "By the magnetism of interest our
      affections are irresistibly attracted." --Glanvill.
      [1913 Webster]

   Animal magnetism, Same as hypnotism, at one time believe
      to be due to a force more or less analogous to magnetism,
      which, it was alleged, is produced in animal tissues, and
      passes from one body to another with or without actual
      contact. The existence of such a force, and its
      potentiality for the cure of disease, were asserted by
      Mesmer in 1775. His theories and methods were afterwards
      called mesmerism, a name which has been popularly applied
      to theories and claims not put forward by Mesmer himself.
      See Mesmerism, Biology, Od, Hypnotism.

   Terrestrial magnetism, the magnetic force exerted by the
      earth, and recognized by its effect upon magnetized
      needles and bars.
      [1913 Webster]

WordNet (r) 3.0 (2006):

magnetism
    n 1: attraction for iron; associated with electric currents as
         well as magnets; characterized by fields of force [syn:
         magnetism, magnetic attraction, magnetic force]
    2: the branch of science that studies magnetism [syn:
       magnetism, magnetics]

Moby Thesaurus II by Grady Ward, 1.0:

144 Moby Thesaurus words for "magnetism":
   acceptability, adduction, affinity, agacerie, agreeability, allure,
   allurement, appeal, ascendancy, attractance, attraction,
   attractiveness, attractivity, authority, beguilement, beguiling,
   bewitchery, bewitchment, blandishment, cajolery, capillarity,
   capillary attraction, captivation, centripetal force, charisma,
   charm, charmingness, clout, come-hither, consequence, control,
   credit, desirability, diamagnetism, dominance, domination, drag,
   draw, drawing power, effect, electromagnetism, eminence,
   enchantment, enthrallment, enticement, entrapment, esteem,
   fascination, favor, ferromagnetism, flirtation, forbidden fruit,
   force, gilbert, glamour, good feeling, gravitation, gravity, hold,
   hysteresis, hysteresis curve, importance, incidental power,
   inducement, influence, influentiality, insinuation, interest,
   inveiglement, invitation, irresistibility, leadership, leverage,
   likability, lovability, lure, magic, magnetic circuit,
   magnetic conductivity, magnetic creeping, magnetic curves,
   magnetic dip, magnetic elements, magnetic figures, magnetic flux,
   magnetic friction, magnetic hysteresis, magnetic lag,
   magnetic moment, magnetic permeability, magnetic potential,
   magnetic remanence, magnetic variation, magnetic viscosity,
   magnetics, magnetization, mastery, maxwell, moment,
   mutual attraction, paramagnetism, permeability, personality,
   persuasion, potency, power, predominance, preponderance, pressure,
   prestige, provocativeness, pull, pulling power, purchase, reign,
   repute, residual magnetism, rule, say, seducement, seduction,
   seductiveness, sex appeal, snaring, suasion, subtle influence,
   suggestion, supremacy, sway, sympathy, tantalization, temptation,
   traction, tug, unobjectionableness, upper hand, weber, weight,
   whip hand, winning ways, winsomeness, witchcraft, witchery,
   wooing



The Devil's Dictionary (1881-1906):

MAGNETISM, n.  Something acting upon a magnet.
    The two definitions immediately foregoing are condensed from the
works of one thousand eminent scientists, who have illuminated the
subject with a great white light, to the inexpressible advancement of
human knowledge.