crack up
few cards shy of a full deck
mad
maddening
insane
insanity
go potty
go moggy
drive someone crazy
derange
maniacal
go mad
vesania
lose one's mind
madden
psycho
insaneness
maniac
insaniac
agateophobia
sick-ass
mad person
pagal
lunatic
lunatically
unbalanced
jimjam
sick
demented
unhinged
crazy
brainsick
disturbed
unbalance
dementia
off-minded
manicky
screw loose
distraction
come unhinged
mania
insanability
have a screw loose
psychotically
mentally challenged
louse up
hystericky
pseudomanic
insanitarily
go bitchcakes
lunatize
pop one's cork
nutballs
topsy-turvy
Caligulism
bug out
non compos mentis
loco
mooner
gelt
aberration
lose it
craziness
go crazy
madness
stark staring mad
flabbergast
insanitariness
hypermania
semimadness
cognosce
ghastliness
maniaphobia
psychogonical
set one's hair on fire
mishegoss
go to pieces
kerfuffle
maniacally
lose one's marbles
mommick
hysterization
go ballistic
hyperreligiosity
unhinge
manic depressive illness
nutso
paranoia
manic depression
manic-depressive psychosis
bipolar disorder
schizophrenically
delusive
mad as a fish
few cards shy of a full deck
mad
maddening
insane
maniacal
psycho
insaniac
sick-ass
lunatic
unbalanced
jimjam
sick
demented
unhinged
crazy
brainsick
disturbed
off-minded
manicky
mentally challenged
hystericky
pseudomanic
nutballs
non compos mentis
stark staring mad
psychogonical
delusive
mad as a fish
lunatically
psychotically
insanitarily
maniacally
schizophrenically
insanity
vesania
insaneness
maniac
agateophobia
mad person
pagal
psycho
dementia
screw loose
distraction
mania
insanability
Caligulism
mooner
gelt
aberration
craziness
madness
insanitariness
hypermania
semimadness
ghastliness
maniaphobia
mishegoss
mommick
hysterization
hyperreligiosity
manic depressive illness
nutso
paranoia
manic depression
manic-depressive psychosis
bipolar disorder
crack up
go potty
go moggy
drive someone crazy
derange
go mad
lose one's mind
madden
unbalance
come unhinged
have a screw loose
louse up
go bitchcakes
lunatize
pop one's cork
topsy-turvy
bug out
loco
lose it
go crazy
flabbergast
cognosce
set one's hair on fire
go to pieces
kerfuffle
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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