omniabsent
nonexistent
has left the building
nowhence
when Hell freezes over
when two Sundays come together
uneverted
not while pussy's a cat
when two Sundays meet
nevah
never ever
only if
only
only when
nonpresent
unstayed
unvanished
out of thin air
down to
nonabsent
nowhere to be found
all-victorious
Nothingville
unlingering
impassive
non-coming
seldomly
betwixt and between
unprecedented
stock-still
unpausingly
in no way
eternal
unbegun
unwitnessed
momentary
null
destitute
at rest
uncoupled
undisestablished
unlivened
findless
never
unknowingly
under no circumstance
unsituated
unbeheld
napoo
unwaited