invalid
aimless
annul
bad
bare
barren
bland
blank
bleached
characterless
cipher
clear
designless
devoid
empty
existless
featureless
garbled
hollow
importless
inane
ineffective
ineffectual
inefficacious
insignificant
insipid
lacking
meaningless
minus
missing
negative
nonconnotative
nondenotative
nonexistent
nugatory
null and void
phatic
purportless
purposeless
scrambled
senseless
trifling
unexisting
unmeaning
unrelieved
unsignificant
useless
nulled
nulling
nulls
&&
32-bit
Boolean
binary
discrete
erroneous
integer
multiple
negligible
numeric
optional
static
unauthorized
valid
Hull
Mull
Shull
crull
cul
cull
dull
gul
gull
hull
kuhl
lull
mull
scull
skull
stull
trull
tull
ul