airy
asomatous
astral
atomic
bodiless
corpuscular
decarnate
decarnated
discarnate
disembodied
embryonic
ethereal
evanescent
extramundane
germinal
ghostly
granular
immaterial
impalpable
imperceptible
imponderous
inappreciable
incomprehensible
inconceivable
incorporate
incorporeal
indiscernible
inestimable
infinitesimal
insensible
insubstantial
intangible
invisible
microcosmic
microscopic
molecular
nonmaterial
nonphysical
nonsubstantial
occult
otherworldly
phantom
psychic
shadowy
spiritual
subatomic
subtle
supernatural
tenuous
thin
influence
leaven
leavening
all-pervading
all-searching
gluey
incommunicable
indivisible
inflammable
inodorous
luminiferous
pervasive
problematical
ring-fence
self-contradictory
smoke-like
supernatant
undefined
unknowable
unnameable
unobservable
wavelike