nothing
nothingness
naught
nil
nullity
zero
cipher
nobody
no one
never
nonentity
flash in the pan
shadow
phantom
dream
air
thin air
vapor
bubble
"baseless fabric of
a vision" [Tempest]
mockery
hollowness
blank
void
inanity
fool's paradise
disappear
vanish
evaporate
fade
dissolve
melt away
baseless
groundless
ungrounded
immaterial
unreal
spectral
dreamy
shadowy
ethereal
airy
gossamery
illusory
insubstantial
empty
eviscerated
blank
hollow
nominal
null
vacant
vacuous
inane