insane
aliene
batty
bedlamite
berserk
borderline case
crackbrain
cracked
crackpot
crazed
crazy
delirious
dement
demented
demoniac
deranged
deranged person
energumen
enthusiast
fan
fanatic
fiend
flake
fou
frantic
freak
frenetic
frenzied
furious
idiot
kook
loon
loony
lunatic
mad
madman
meshuggenah
non compos
noncompos
nut
phrenetic
psychopath
psychotic
rabid
raging
ranting
raving lunatic
screwball
fancier
-maniac
mania
maniacal
abandon
addict
bigot
brute
demagogue
dictator
drunkard
hypocrite
insanity
killer
liar
moron
murderer
robber
ruffian
scoundrel
thug
wretch
megalomaniac
nymphomaniac