Synonyms of brainless
120 similar words · 2 opposite words
Another word for brainless is sheep-headed. Other synonyms of brainless are bullet-headed, hammer-headed, mindless, half-witted and slow-witted. The opposite of brainless is engrossing.
Synonyms and similar words for brainless
adjectiveHaving no brain.
- anencephalousWithout a brain.
adjectiveUnintelligent, with little common sense.
- half-brainedExhibiting low intelligence, as if having only half a brain.
- half-wittedHaving low intelligence.
- addlebrainedSynonym of addlepated.
- addlepatedAddled; confused; stupid; flustered.
- airheaded
- bee-brainedExtremely stupid.
- beef-wittedStupid; dull.
- soft informal
- beefheadedStupid; dull-witted.
- beetle-headedMentally dull; stupid.
- birdbrainedSilly and frivolous; empty-headed.
- blockheadedResembling a blockhead; stupid.
- Boeotian
- boneheadedResembling or characteristic of a bonehead.
- boofheadedStupid; dimwitted.
- braindead
- bubbleheadedStupid; vacuous.
- buffle-headedDull; stupid; blundering.
- bullet-headedStubborn and stupid.
- cerebrally challengedOf low intelligence; stupid.
- childish
- chowderheadedStupid; foolish; lacking in common sense.
- chuckleheadedStupid, idiotic.
- crackbrainedIdiotic.
- cretinousCharacteristic of a cretin; very stupid.
- daft
- denseSlow to comprehend; of low intelligence. (of a person).
- dentedExtremely stupid.
- dim-bulbSlow-witted, stupid.
- dim-headedSynonym of dim-witted.
- dim-wittedBeing a dimwit; stupid; foolish; simple.
- dimNot smart or intelligent.
- doltishLike a dolt; dull in intellect; stupid.
- dopeyStupid, silly.
- dozyIntellectually slow.
- drowsyDull; stupid.
- dull-headedSynonym of dull-witted.
- dull-mindedDim-witted, stupid, unintelligent.
- dull-wittedHaving a dull, blunt wit or mind; unintelligent.
- dullNot bright or intelligent; stupid; having slow understanding.
- dumber than a box of rocksVery stupid.
- dumbStupid.
- dunderheadedStupid, foolish.
- empty-headedUnintelligent.
- fatheadedCharacteristic of a fathead; stupid.
- feeble-mindedWeak in intellectual power; lacking firmness or constancy; lacking intelligence.
- flea-brainedIdiotic.
- foolish
- fuzzy-headed
- fuzzy-mindedSynonym of fuzzy-headed: characterized by vague or confused thinking, dull-witted.
- goofy
- hammer-headedStupid, ignorant.
- idiotic
- ignorant
- imbecilicLike or as an imbecile; so senseless as to be laughable; absurd, foolish, stupid, idiotic.
- inane
- insipid
- intellectually challengedOf low intelligence; stupid.
- knuckleheadedStupid or inept, like a knucklehead.
- lamebrainedFoolish; stupid.
- lowbrowUnsophisticated, not intended for an audience of intelligence, education or culture.
- lumpishDull and slow in acting, thinking, etc.; without energy; cloddish, lethargic, slow-witted, sluggish.
- lunkheadedObtuse; foolish; idiotic.
- mentally challengedHaving low intelligence.
- mentally retarded offensiveIntellectually disabled, medically defined as having an IQ (intelligence quotient) below 70 in addition to deficits in...
- mindlessShowing a lack of forethought or sense.
- monosynaptic
- moronic
- muttonheadedBeing a muttonhead; stupid or foolish.
- nitwittedBeing like a nitwit; being foolish or stupid.
- numbskulledStupid.
- oafishCharacteristic of or resembling an oaf; clumsy, stupid.
- obtuse
- peabrainedStupid; moronic.
- prattyStupid, silly.
- pudding-headedStupid.
- puerile
- purblind literaryOf a person: lacking in discernment or understanding; dim-witted, unintelligent.
- quarter-wittedHaving or displaying half the mental capacity of a half-wit.
- retarded offensive
- ridiculous
- rockheadedBoneheaded, stupid.
- sharp as a bowling ballNot at all sharp-witted; very stupid.
- sheep-headedSilly; simple-minded; stupid.
- silly
- simpleFeeble-minded; foolish.
- slow
- slow on the uptakeOf a person, slow to comprehend or process intellectually.
- slow-wittedLacking a keen or swift intellect, not too bright or not too swift.
- smooth-brainedStupid, foolish; ignorant.
- stolidDully or heavily stupid.
- stupid
- thick-skulledSynonym of thickheaded.
- thickheadedStupid, obtuse or dumb.
- thickwittedStupid, dim-witted.
- thickStupid.
- unapprehensive
- uncleverNot clever.
- uninformed
- unintelligentNot intelligent.
- unsmartNot smart (in various senses).
- vacant
- vacuousShowing a lack of thought or intelligence; vacant.
- witless
- wooden-headedStupid; mentally dull.
- wool-headed
- woolly-headed
- woolly-minded
- dumb as a bag of hammersRemarkably stupid.
- dumb as a box of rocksVery stupid.
- dumb as a doorknobVery stupid.
- dumb as an oxStupid.
- dumb as a postExtremely stupid.
- dumb as a sack of hammersSynonym of dumb as a bag of hammers.
- dumb as dirtExtremely stupid.
- dumber than a rockExtremely stupid.
- not the sharpest crayon in the boxSynonym of not the sharpest knife in the drawer.
- not the sharpest knife in the drawerLacking in intelligence; dimwitted.
- not the sharpest tool in the shedLacking in intelligence; dimwitted.
Opposite of brainless
adjectiveUnintelligent, with little common sense.
- brainyVery intellectually capable.
adjectiveOf an action performed, overly repetitive and unchallenging, not requiring any careful attention or...
- engrossingUtterly consuming one's time and attention.
Meaning of brainless
- adjective Having no brain.
- adjective Unintelligent, with little common sense.
- adjective Of an action performed, overly repetitive and unchallenging, not requiring any careful attention or providing any significant stimulation.
brainless in other languages
Questions about synonyms of brainless
- What is another word for brainless?
- Brainless has 120 synonyms on Word.ws, such as sheep-headed, bullet-headed, hammer-headed, mindless, half-witted, slow-witted, half-brained and unintelligent.
- What is the opposite of brainless?
- The opposite of brainless is engrossing.
- What does brainless mean?
- Brainless means having no brain.
Source and license
Adapted from Wiktionary: brainless (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 brainless.” Word.ws, https://word.ws/synonyms/brainless. Based on Wiktionary, CC BY-SA 4.0.