absence
absence of mind
blank
blankness
broom
brush
brush off
clean slate
deprivation
emptiness
empty space
empty-headedness
hollowness
hoover
hoovering
inanity
jejunity
mental void
negation
negativeness
negativity
nihility
nonbeing
nonentity
nonexistence
nonoccurrence
nonreality
nonsubsistence
not-being
nothing
nothingness
nullity
sweep
sweep out
sweep up
tabula rasa
to
unactuality
unreality
vacancy
vacuity
vacuousness
vacuum-clean
vapidity
void
voidness
whisk
vacua
clean
make clean
part
region
space
vacuumed
vacuuming
vacuums
brake
electric
emergency
fusion
gas
gravity
hydraulic
laser
oxygen
plastic
portable
pressure
pump
radiation
rubber
steam
storage
suction
thermal
turbine
waste
plenum