crack up
few cards shy of a full deck
mad
maddening
insane
go moggy
go potty
insanity
drive someone crazy
derange
maniacal
go mad
vesania
lose one's mind
madden
psycho
maniac
insaneness
agateophobia
sick-ass
insaniac
mad person
pagal
lunatically
lunatic
sick
crazy
demented
unhinged
disturbed
brainsick
jimjam
unbalanced
manicky
off-minded
screw loose
unbalance
dementia
distraction
have a screw loose
mania
insanability
come unhinged
psychotically
hystericky
mentally challenged
louse up
pseudomanic
go bitchcakes
lunatize
nutballs
insanitarily
pop one's cork
topsy-turvy
lose it
aberration
Caligulism
gelt
non compos mentis
craziness
mooner
loco
bug out
madness
insanitariness
stark staring mad
go crazy
flabbergast
go to pieces
ghastliness
psychogonical
kerfuffle
maniaphobia
mishegoss
semimadness
set one's hair on fire
cognosce
hypermania
maniacally
manic depression
nutso
lose one's marbles
manic depressive illness
hysterization
paranoia
mommick
bipolar disorder
schizophrenically
go ballistic
hyperreligiosity
manic-depressive psychosis
unhinge
delusive
mad as a fish
few cards shy of a full deck
mad
maddening
insane
maniacal
psycho
sick-ass
insaniac
lunatic
sick
crazy
demented
unhinged
disturbed
brainsick
jimjam
unbalanced
manicky
off-minded
hystericky
mentally challenged
pseudomanic
nutballs
non compos mentis
stark staring mad
psychogonical
delusive
mad as a fish
lunatically
psychotically
insanitarily
maniacally
schizophrenically
insanity
vesania
maniac
insaneness
agateophobia
mad person
pagal
psycho
screw loose
dementia
distraction
mania
insanability
aberration
Caligulism
gelt
craziness
mooner
madness
insanitariness
ghastliness
maniaphobia
mishegoss
semimadness
hypermania
manic depression
nutso
manic depressive illness
hysterization
paranoia
mommick
bipolar disorder
hyperreligiosity
manic-depressive psychosis
crack up
go moggy
go potty
drive someone crazy
derange
go mad
lose one's mind
madden
unbalance
have a screw loose
come unhinged
louse up
go bitchcakes
lunatize
pop one's cork
topsy-turvy
lose it
loco
bug out
go crazy
flabbergast
go to pieces
kerfuffle
set one's hair on fire
cognosce
lose one's marbles
go ballistic
unhinge
English words for 'To become insane; to suffer a mental breakdown.'
As you may have noticed, above you will find words for "To become insane; to suffer a mental breakdown.". Hover the mouse over the word you'd like to know more about to view its definition. Click 
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