demented
Gone completely mad
Demented describes a state of madness or severe mental deterioration.
In clinical contexts, it relates to dementia—cognitive decline affecting memory, reasoning, and behavior.
More loosely, demented means crazy or irrational: a demented scheme, demented laughter.
The word often suggests something unsettling or disturbing rather than merely eccentric.
Mentally unhinged
- madUnhinged or enraged
- derangedMentally disturbed, irrational
- unhingedMentally or emotionally unstable
- lunaticDeranged or irrational person
psychotic · crazed · maniacal · disturbed · unbalanced · irrational · delusional · berserk
Mentally unhinged
- nutsSeeds in shells
- bonkersWildly irrational, unhinged
- loopyMildly crazy, informal
- battyMildly eccentric or daft
nutty · loony · screwy · wacko · loco · touched · bananas · crackers
Threateningly suggestive of harm
- twistedWound around itself
- macabreDisturbing, death-obsessed
- sadisticFinding pleasure in cruelty
- ghoulishFascinated by death grotesquely
monstrous · fiendish · diabolical · wicked · evil · malevolent · creepy · nightmarish
Degenerative brain disease
- cognitive declineWorsening of thought abilities
- memory lossFailure to recall
- senilityAge-related mental decline
- neurodegenerationProgressive loss of neurons
deterioration · impairment · disorientation · confusion · forgetfulness · sundowning · agitation · wandering
crazy
Mentally unhinged
- madUnhinged or enraged
- derangedMentally disturbed, irrational
- unhingedMentally or emotionally unstable
lunatic · psychotic · crazed · maniacal · disturbed · unbalanced · irrational · delusional · berserk · frenzied
crazy
Mentally unhinged
batty · nutty · loony · screwy · wacko · loco · touched · bananas · crackers · barmy
sinister
Threateningly suggestive of harm
ghoulish · monstrous · fiendish · diabolical · wicked · evil · malevolent · creepy · nightmarish · terrifying
Alzheimer's
Degenerative brain disease
- cognitive declineWorsening of thought abilities
- memory lossFailure to recall
- senilityAge-related mental decline
neurodegeneration · deterioration · impairment · disorientation · confusion · forgetfulness · sundowning · agitation · wandering · diagnosis
dementedsane
Mentally healthy, clearheaded
of sound mind · healthy · compos mentis · unimpaired · lucid
- dementia careAssistance for cognitive deterioration
- dementia unitWard for cognitive decline
- dementia patientOne with progressive cognitive impairment
- vascular dementiaCognitive loss from impaired cerebral circulation
- dementia screeningTest for progressive mental decline
- dementia specialistExpert in cognitive deterioration