Synonyms of insane
92 similar words · 2 opposite words
Another word for insane is crazy. Other synonyms of insane are weird, mad, bananas, lunatic and crazed. The opposite of insane is sober.
Synonyms and similar words for insane
adjectiveMore synonyms
- 5150 US, slangOf such an unsound mind that one should be involuntarily confined.
- bananasCrazy, mad, nuts.
- barking
- barking madCompletely insane.
- buggishCrazy.
- buggy slang
- bughouse slangCrazy, insane.
- barmyCrazy, mad; also, eccentric, odd, strange.
- batchy BritishOf unsound mind, crazy; lacking good sense or judgment, silly.
- batpoopToo irrational to be dealt with sanely.
- batsMad, insane.
- batty
- bonkersMad; crazy.
- bread baskets British
- crackedCrazy; crackpot.
- crackersCrazy, insane.
- cra-cra slang
- cray slangCrazy.
- cray-cray slangCrazy.
- crazedMaddened; driven insane.
- crazyOf unsound mind; insane; demented.
- crazy as a bedbugUtterly mad; insane.
- crazy as a cootieCompletely crazy; insane.
- crazy as a cootie bugCompletely crazy; insane.
- crazy as a pet coonDemented or crazy.
- cuckooCrazy; not sane.
- daffySomewhat mad or eccentric.
- daftCrazy, insane, mad.
- dementedInsane; mentally ill.
- derangedInsane.
- distraughtMad; insane.
- disturbed
- doolally BritishEccentric; insane, mad.
- dottyMildly insane or eccentric; often, senile.
- eccentric
- fruit loopsCrazy; deranged; fruity.
- gaga
- hatstandCrazy, insane.
- harebrained
- kookyEccentric, strange, or foolish; crazy or insane; kookish.
- loon
- loco
- loonyInsane.
- loony tunesInsane; crazy.
- loopyIdiotic; crazy.
- lunaticCrazed, mad, insane, demented.
- madInsane; crazy; mentally deranged.
- mentalMentally disordered; insane, mad, crazy.
- mentally illHaving a psychological disorder.
- meshigener
- meshuggeCrazy, mad, senseless, insane.
- nertsCrazy; nuts.
- non compos mentis literaryInsane; not of sound mind; not in control of oneself.
- nonsaneSynonym of insane.
- nucking futs euphemistic, humorousFucking nuts; completely insane.
- nut jobSomeone who is crazy (insane).
- nutballsCrazy, insane, unhinged.
- nut
- nutsInsane, mad.
- nutsoCrazy, insane.
- nuttyBarmy: eccentric, odd; crazy, mad, insane.
- nutter
- off the beamCrazy; insane.
- off the chain
- over the edgeInsane, having lost control.
- pottyInsane.
- psychoPsychotic, psychopathic, or (broadly) otherwise insane.
- psychoceramicCrackpot.
- psychotic
- sickoCharacterized by depraved tastes or habits; deviant.
- screwyCrazy; silly; ridiculous.
- squirrellyEccentric.
- starkers British
- tonto BritishSynonym of crazy.
- unbalanced
- unsaneSynonym of insane.
- wackadoodleCrazy, irrational, or eccentric.
- weirdHaving an unusually strange character or behaviour.
- whackjobA crazy, possibly dangerous, person.
- whacko
- whacky
- wodeMad, angry, crazy, insane, possessed, rabid, furious, frantic.
- yampy BritishBarmy; mad; daft.
- zany euphemistic
- apeshit
- batcrapToo irrational to be dealt with sanely.
- batshitExtremely irrational or unreasonable, insane, crazy.
- bat-shit
- fucked in the headNot right mentally: perverted, stupid, or mentally ill.
- fucked up
- ripshit
- moonsick obsoleteInsane or emotionally deranged, either temporarily or permanently.
Opposite of insane
Meaning of insane
- adjective Exhibiting unsoundness or disorder of mind; not sane; utterly mad.
- adjective Used by or relating to insane people.
- adjective Causing insanity or madness.
insane in other languages
Questions about synonyms of insane
- What is another word for insane?
- Insane has 92 synonyms on Word.ws, such as crazy, weird, mad, bananas, lunatic, crazed, demented and deranged.
- What is the opposite of insane?
- The opposite of insane is sober.
- What does insane mean?
- Insane means exhibiting unsoundness or disorder of mind; not sane; utterly mad.
Source and license
Adapted from Wiktionary: insane (page history and authors) and the entries of the words listed. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws grouped the synonyms and antonyms by meaning and added links. Wiktionary data of 2026-09-02.
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Cite this page: “Synonyms of insane.” Word.ws, https://word.ws/synonyms/insane. Based on Wiktionary, CC BY-SA 4.0.