The Collaborative International Dictionary of English v.0.48:

Materialization \Ma*te`ri*al*i*za"tion\, n.
   The act of materializing, or the state of being materialized.
   [1913 Webster]

WordNet (r) 3.0 (2006):

materialization
    n 1: the process of coming into being; becoming reality; "the
         materialization of her dream" [syn: materialization,
         materialisation]
    2: an appearance in bodily form (as of a disembodied spirit)
       [syn: materialization, materialisation, manifestation]
    3: something that comes into existence as a result;
       "industrialism prepared the way for acceptance of the French
       Revolution's various socialistic offspring"; "this skyscraper
       is the solid materialization of his efforts" [syn:
       offspring, materialization, materialisation]

Moby Thesaurus II by Grady Ward, 1.0:

131 Moby Thesaurus words for "materialization":
   Christophany, Masan, Ouija, Satanophany, accident, angelophany,
   apparition, appearance, appearing, arising, astral, astral spirit,
   automatic writing, automatism, avatar, banshee, coming,
   coming into being, coming to be, coming-forth, concretization,
   constitution, contingency, contingent, control, corporealization,
   departed spirit, disclosure, disembodied spirit, dissemination,
   duppy, dybbuk, effectuation, eidolon, embodiment, emergence,
   epiphany, establishment, event, eventuality, eventuation, evidence,
   evincement, exposure, expression, form, formation, forthcoming,
   foundation, ghost, grateful dead, guide, hant, haunt, idolum,
   immateriality, inauguration, incarnation, inception, incidence,
   incorporation, incorporeal, incorporeal being, incorporeity,
   indication, installation, institution, issuance, larva, lemures,
   levitation, manes, manifestation, materializing, metempsychosis,
   occurrence, oni, opening, organization, personification, phantasm,
   phantasma, phantom, planchette, pneumatophany, poltergeist,
   poltergeistism, presence, presentation, proof, psychography,
   psychorrhagy, publication, realization, reembodiment, reification,
   reincarnation, revelation, revenant, rise, rising, setting-up,
   shade, shadow, shape, showing, showing forth, shrouded spirit,
   specter, spectral ghost, spirit, spirit manifestation,
   spirit rapping, spook, sprite, substantiation, table tipping,
   telekinesis, teleportation, telesthesia, theophany,
   trance speaking, transmigration, unfolding, unfoldment,
   unsubstantiality, vision, walking dead man, wandering soul, wraith,
   zombie