airiness
airy nothing
bodilessness
disembodiedness
ethereality
fineness
flimsiness
ghostliness
immateriality
immaterialness
impalpability
imponderability
incorporealism
incorporeity
inextension
insolidity
insubstantiality
intangibility
mistiness
nonexteriority
occult phenomena
occultism
otherworldliness
psychical research
psychicism
psychics
psychism
rareness
rarity
shadowiness
slightness
spirit world
spirituality
spirituousness
subtility
subtilty
subtlety
supernaturalism
tenuity
tenuousness
the occult
thinness
unconcreteness
unearthliness
unreality
unsolidity
unsubstantiality
unsubstantialness
quality
abstractness
intangibleness