The Collaborative International Dictionary of English v.0.48:

Unphysical \Unphysical\
   See physical.

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "unphysical":
   airy, asomatous, astral, bodiless, decarnate, decarnated,
   discarnate, disembodied, ethereal, extramundane, ghostly,
   immaterial, impalpable, imponderable, incorporate, incorporeal,
   insubstantial, intangible, metaphysical, nonmaterial, nonphysical,
   occult, otherworldly, phantom, psychic, shadowy, spiritual,
   supernatural, transmundane, unearthly, unembodied, unextended,
   unfleshly, unsubstantial, unworldly