insane
abnormal
bereft of reason
brainsick
crackbrained
cracked
crazed
crazy
daft
deluded
demented
deprived of reason
deranged
disarranged
disjointed
dislocated
disoriented
displaced
distraught
flighty
hallucinated
irrational
loco
lunatic
mad
maddened
manic
mazed
mental
mentally deficient
meshuggah
moon-struck
non compos
non compos mentis
not all there
not right
odd
of unsound mind
off
out
out of gear
out of joint
psycho
queer
reasonless
senseless
sick
stark-mad
stark-staring mad
strange
binged
cringed
hinged
impinged
infringed
singed