Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class III. Words Relating to Matter
Section I. Matter in General
4. Motion with Reference to Direction

317. Immateriality.

   NOUN:IMMATERIALITY, immaterialness; incorporeity, dematerialization, insubstantiality, incorporality, decarnation [obs.], unsubstantiation, unsubstantiality, spirituality; inextension; astral plane.
  PERSONALITY; I, myself, me.
  ego, spirit (soul) [See Intellect]; astral body, etheric double, subliminal self, subconscious self, higher self.
  IMMATERIALISM; spiritualism, spiritism, animism, Platonism; Platonic -Idea, – Ideal.
  IMMATERIALIST, spiritualist, spiritist, animist, Platonist.
   VERB:IMMATERIALIZE, dematerialize, unsubstantialize [rare]; disembody, spiritualize.
   ADJECTIVE:IMMATERIAL, immateriate, incorporeal, incorporal, incorporate, unsubstantial, insubstantial, immateriate [obs.], spiritistic, animistic; unfleshly; supersensible; asomatous, unextended; unembodied, discarnate, bodiless, decarnate or decarnated, disembodied; extramundane, unearthly; pneumatoscopic; spiritual (psychical) [See Intellect]; Platonistic.
  SUBJECTIVE, personal, nonobjective.
  1. There is a natural body, and there is a spiritual body.—Biblical
  2. The Thee in Me who works behind The Veil.—Omar Khayyám—Fitzgerald