— amok
— amuck
— around the bend
— balmy
— barmy
— bats
— batty
— berserk
— bonkers
— brainsick
— buggy
— certifiable
— certified
— crackbrained
— cracked
— crackers
— crazed
— crazy
— cuckoo
— daffy
— daft
— daft as a brush
— demented
— demoniac
— demoniacal
— deranged
— dippy
— disturbed
— dotty
— dumb
— fey
— foolish
— fruity
— half-crazed
— haywire
— hebephrenic
— idiotic
— imagine
— imagined
— in a jam
— in essence
— incense
— incensed
— incentive
— income
— incommode
— inconstant
— innocence
— innocent
— insanity
— insensate
— insensible
— insentient
— insincere
— insinuate
— insinuated
— insomnia
— irrational
— kookie
— kooky
— loco
— loony
— loopy
— lunatic
— mad
— maniac
— maniacal
— manic-depressive
— maniclike
— mentally ill
— moonstruck
— non compos mentis
— nuts
— nutsy
— nutty
— of unsound mind
— paranoid
— possessed
— potty
— psychopathic
— psychopathologic
— psychopathological
— psychotic
— raving mad
— round the bend
— round the twist
— schizo
— schizophrenic
— screw-loose
— screwy
— sick
— stupid
— touched
— unbalanced
— unhinged
— unreasonable
— unsound
— unstable
— wacko
— wacky
— whacky
— wild