Synonyms of the word

insane

• adj. Exhibiting unsoundness or disorder of mind; not sane; mad; deranged in mind; delirious; distracted.
• adj. Used by, or appropriated to, insane persons.
• adj. Causing insanity or madness.
• adj. Characterized by insanity or the utmost folly; ridiculous; unpractical.

amok

• adv. Out of control, especially when armed and dangerous.
• adv. In a frenzy of violence, or on a killing spree; berserk.
• n. One who runs amok; in Malay and Moro/Philippine culture, one who attempts to kill many others, especially…

amuck

• adv. In a frantic or frenzied and violent manner; in a confused, jumbled or uncontrolled state.

balmy

• adj. Producing balm.
• adj. Soothing or fragrant.
• adj. Mild and pleasant.
• adj. (informal) Foolish; slightly crazy or mad; eccentric.

barmy

• adj. (rare) containing barm, i.e. froth from fermented yeast.
• adj. (chiefly Britain) odd, strange.

bats

• n. plural of bat.
• v. Third-person singular simple present indicative form of bat.
• adj. (informal) Mad, insane.

batty

• adj. (slang) Mad, crazy, silly.
• adj. (obsolete) Belonging to, or resembling, a bat (mammal).
• n. (West Indian slang) The buttocks or anus.
• n. (Jamaica, Britain, derogatory) A homosexual man.

berserk

• n. A crazed Norse warrior who fought in a frenzy; a berserker.
• adj. Injuriously, maniacally, or furiously violent or out of control.
• adj. weird; strange.

bonkers

• adj. (informal) Mad; crazy.
• n. plural of bonker.

brainsick

• adj. Disordered in the understanding; giddy; thoughtless.

buggy

• n. A small horse-drawn cart.
• n. A small motor vehicle, such as a dune buggy.
• n. (Britain) A pushchair; a stroller.
• n. (Canada, Southern US) A shopping cart or trolley.
• adj. Infested with insects.
• adj. (computing) Containing programming errors.
• adj. Resembling an insect.

certifiable

• adj. (of a document) That can, or that must be certified.
• adj. (informal, of a person) Mentally ill to such an extent that involuntary institutionalization is appropriate;…
• n. (informal) A crazy person.

certified

• v. simple past tense and past participle of certify.

crackbrained

• adj. Idiotic.

cracked

• adj. Broken so that cracks appear on, or under, the surface.
• adj. Broken into coarse pieces.
• adj. (of a voice) Harsh or dissonant.
• adj. (slang) Crazy; crackpot.
• v. simple past tense and past participle of crack.

crackers

• n. plural of cracker.
• n. (South Africa, only plural) A kind of noisy leather pants or trousers.
• adj. (Britain colloquial) Crazy, insane.
• v. Third-person singular simple present indicative form of cracker.

crazed

• adj. Maddened; driven insane.
• adj. Covered with cracks (generally applied to porcelain).
• v. simple past tense and past participle of craze.

crazy

• adj. Insane; lunatic; demented.
• adj. Out of control.
• adj. Overly excited or enthusiastic.
• adj. In love; experiencing romantic feelings.
• adj. (informal) Unexpected; surprising.
• adj. Characterized by weakness or feebleness; decrepit; broken; falling to decay; shaky; unsafe.
• adv. (slang) Very, extremely.
• n. An insane or eccentric person; a crackpot.
• n. (slang, uncountable) Eccentric behaviour; lunacy.

daft

• adj. insane, mad.
• adj. silly.
• adj. stupid.

demented

• adj. Insane or mentally ill.
• adj. Suffering from dementia.
• adj. (informal) Crazy; ridiculous.
• v. simple past tense and past participle of dement.

demoniac

• adj. possessed or controlled by a demon.
• adj. Of or pertaining to demons; demonic.
• n. Someone who is possessed by a demon.

demoniacal

• adj. Pertaining to, characteristic of, or produced by a demon or evil spirit; devilish or fiendish.

deranged

• adj. disturbed or upset, especially mentally.
• adj. insane.
• v. simple past tense and past participle of derange.

distracted

• v. simple past tense and past participle of distract.
• adj. having one's attention diverted; preoccupied.
• adj. distraught.

disturbed

• adj. Showing symptoms of mental illness, severe psychosis, or neurosis.
• adj. Extremely alarmed; shocked.
• v. simple past tense and past participle of disturb.

dotty

• adj. Having many dots.
• adj. (Britain) Mildly insane or excessively preoccupied; often, senile.
• adj. (Britain, dated) Having an unsteady gait.

fey

• adj. (dialectal or archaic) About to die; doomed; on the verge of sudden or violent death.
• adj. (obsolete) Dying; dead.
• adj. (chiefly Scottish, Irish) possessing second sight, clairvoyance, or clairaudience.
• adj. overrefined, affected.
• adj. Strange or otherworldly.
• adj. Spellbound.
• adj. Magical or fairylike.
• n. Fairy folk collectively.

foolish

• adj. (of a person, an action, etc.) Lacking good sense or judgement; unwise.
• adj. Resembling or characteristic of a fool.

fruity

• adj. containing fruit or fruit flavoring.
• adj. similar to fruit or tasting of fruit.
• adj. (informal) mad, crazy.
• adj. (informal, derogatory, LGBT, of a male) effeminate or otherwise flamboyant or homosexual.
• adj. (Britain, informal) sexually suggestive.

harebrained

• adj. (of an idea or plan etc) absurd, foolish or stupid.
• adj. (of a person) frivolous and silly; featherbrained or scatterbrained.

haywire

• n. Wire used to bind bales of hay.
• adj. Roughly-made, unsophisticated, decrepit (from the use of haywire for temporary repairs).
• adj. Behaving erratically or uncontrollably, especially of a machine or mechanical process; usually used with…

hebephrenic

• adj. Pertaining to, or characteristic of, hebephrenia.
• n. An individual who exhibits hebephrenia.

idiotic

• adj. Pertaining to or resembling an idiot; afflicted with idiocy.
• adj. Having the quality of idiocy; very foolish; stupid; nonsensical.

irrational

• adj. Not rational; unfounded or nonsensical.
• adj. (mathematics, arithmetic, number theory, not comparable) Of a real number, that cannot be written as the…
• n. A real number that can not be expressed as the quotient of two integers, an irrational number.

kookie

• adj. Alternative form of kooky.

kooky

• adj. (slang) Eccentric, strange, or foolish; crazy or insane; kookish.
• adj. (surfing) Behaving like a kook (a person with poor style or skill); kook-like.

loco

• adv. (music) A direction in written or printed music to return to the proper pitch after having played an octave…
• adj. (colloquial) crazy.
• adj. (western US) intoxicated by eating locoweed.
• n. Certain species of Astragalus or Oxytropis, capable of causing locoism.
• v. (transitive) To poison with the loco plant; to affect with locoism.
• v. (transitive, colloquial, by extension) To render insane.
• n. (rail transport, informal, chiefly India and surrounding South Asian countries) a locomotive.

loony

• adj. (of a person) Insane.
• adj. (of a thing) Very silly, absurd.
• n. An insane or very foolish person.

loopy

• adj. Having loops.
• adj. (slang) Idiotic, crazy or drunk.

lunatic

• n. An insane person.
• adj. crazed, mad, insane, demented.

mad

• adj. Insane; crazy, mentally deranged.
• adj. (chiefly US; UK dated + regional) Angry, annoyed.
• adj. Wildly confused or excited.
• adj. Extremely foolish or unwise; irrational; imprudent.
• adj. (colloquial, usually with for or about) Extremely enthusiastic about; crazy about; infatuated with; overcome…
• adj. (of animals) Abnormally ferocious or furious; or, rabid, affected with rabies.
• adj. (slang, chiefly Northeastern US) Intensifier, signifies an abundance or high quality of a thing; very,…
• adj. (of a compass needle) Having impaired polarity.
• adv. (slang, New England, New York and Britain, dialect) Intensifier; to a large degree; extremely; exceedingly;…
• v. (obsolete, intransitive) To be or become mad.
• v. (now colloquial US) To madden, to anger, to frustrate.

maniac

• n. An insane person, especially one who suffers from a mania.
• n. A fanatic, a person with an obsession.

maniacal

• adj. Like a maniac; insane; frenzied.

manic-depressive

• adj. Exhibiting manic depression.

moonstruck

• adj. (obsolete) Crazy or insane when affected by the phases of the Moon.
• adj. (by extension) Showing irrational behaviour, especially of a romantic or sentimental nature.
• adj. (obsolete) Made sick, or (like fishes) unsuitable for food, by the supposed influence of the Moon.

nuts

• n. plural of nut.
• n. (vulgar, slang) Testicles.
• n. (poker) An unbeatable hand; the best poker hand available.
• adj. (colloquial) Insane, mad.
• adj. (colloquial, figuratively) Crazy, mad; unusually pleased or, alternatively, angered.
• interj. Indicates annoyance, anger, or disappointment.
• interj. Signifies rejection of a proposal or idea, as in forget it, no way, or nothing doing; often followed by…
• v. Third-person singular simple present indicative form of nut.

nutty

• adj. Containing nuts.
• adj. Reminiscent of nuts.
• adj. Barmy, crazy, mad.

paranoid

• adj. Of, related to, or suffering from paranoia.
• adj. Exhibiting extreme and irrational fear or distrust of others.
• n. Someone suffering from paranoia.

possessed

• v. simple past tense and past participle of possess.
• adj. controlled by evil spirits.
• adj. Seized by powerful emotions.
• adj. (construed with of, not comparable) Having; owning.

psychopathic

• adj. Exhibiting the behaviors and personality traits of a psychopath.
• n. (dated) A psychopath.

psychopathologic

• adj. Synonym of psychopathological.

psychopathological

• adj. Of or relating to psychopathology.

psychotic

• adj. Of, related to, or suffering from psychosis.
• n. A person affected by psychosis.

raving

• v. present participle of rave.
• n. (usually in the plural) Wild, incoherent, or irrational talk.
• adj. Talking wildly.
• adj. Causing excitement or wild praise.
• adv. Incoherently.

schizophrenic

• adj. Of or pertaining to schizophrenia.
• adj. (of a person) Afflicted with schizophrenia; having difficulty with perception of reality.
• adj. (colloquial) Behaving as if one has more than one personality; wildly changeable.
• n. A person suffering from schizophrenia.

screwy

• adj. (informal) Crazy; silly; ridiculous; insane; demented; unreasonable.
• adj. (archaic, informal) Tipsy; slightly drunk.

sick

• adj. Having an urge to vomit.
• adj. (chiefly US) In poor health.
• adj. (colloquial) Mentally unstable, disturbed.
• adj. (colloquial) In bad taste.
• adj. Tired of or annoyed by something.
• adj. (slang) Very good, excellent, awesome, badass.
• adj. In poor condition.
• adj. (agriculture) Failing to sustain adequate harvests of crop, usually specified.
• n. Sick people in general as a group.
• n. (Britain, colloquial) vomit.
• v. To vomit.
• v. (obsolete, intransitive) To fall sick; to sicken.
• v. (rare) Alternative spelling of sic.

touched

• adj. Emotionally moved (by), made to feel emotion (by).
• adj. Slightly mentally deficient; touched in the head.
• v. simple past tense and past participle of touch.

unbalanced

• adj. not balanced, without equilibrium; dizzy.
• adj. irrational or mentally deranged.
• adj. (accounting) not adjusted such that debit and credit correspond.
• adj. (computing) of an expression having different numbers of left and right parentheses.
• adj. (American football) an offensive line with more players on one side of the center than on the other.
• v. simple past tense and past participle of unbalance.

unhinged

• v. simple past tense and past participle of unhinge.
• adj. Not furnished with a hinge.
• adj. (philately, of a stamp) Not having ever been mounted using a stamp hinge.
• adj. (figuratively, usually humorous) Mentally ill or unstable.

unreasonable

• adj. Not reasonable.

unsound

• adj. Not sound, particularly.

unstable

• adj. Having a strong tendency to change.
• adj. Fluctuating; not constant.
• adj. Fickle.
• adj. Unpredictable.
• adj. (chemistry) Readily decomposable.
• adj. (physics) Radioactive, especially with a short half-life.
• v. (transitive) To release (an animal) from a stable.

wacky

• adj. zany; eccentric.
• n. Alternative form of wacke.

whacky

• adj. Alternative spelling of wacky.

wild

• adj. Untamed; not domesticated.
• adj. Unrestrained or uninhibited.
• adj. Raucous, unruly, or licentious.
• adj. Visibly and overtly anxious; frantic.
• adj. Disheveled, tangled, or untidy.
• adj. Enthusiastic.
• adj. Inaccurate.
• adj. Exposed to the wind and sea; unsheltered.
• adj. (nautical) Hard to steer; said of a vessel.
• adj. (mathematics, of a knot) Not capable of being represented as a finite closed polygonal chain.
• adv. Inaccurately; not on target.
• n. The undomesticated state of a wild animal.
• n. (chiefly in the plural) a wilderness.
• v. (intransitive, slang) To commit random acts of assault, robbery, and rape in an urban setting, especially…