Synonyms of stupid

120 similar words · 2 opposite words

Another word for stupid is wooden-headed. Other synonyms of stupid are sheep-headed, foolish, dull-minded, bullet-headed and hammer-headed. The opposite of stupid is nonstupid.

Synonyms and similar words for stupid

adjectiveMore synonyms

daftFoolish, silly, stupid.
inept
addlebrainedSynonym of addlepated.
addlepatedAddled; confused; stupid; flustered.
airheaded
bee-brainedExtremely stupid.
beef-wittedStupid; dull.
soft informalFoolish.
beefheadedStupid; dull-witted.
beetle-headedMentally dull; stupid.
birdbrainedSilly and frivolous; empty-headed.
blockheadedResembling a blockhead; stupid.
BoeotianStupid, foolish, dull-witted.
boneheadedResembling or characteristic of a bonehead.
boofheadedStupid; dimwitted.
braindead
brainlessUnintelligent, with little common sense.
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.
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.
foolishLacking good sense or judgement as a general trait; unwise; stupid.
fuzzy-headed
fuzzy-mindedSynonym of fuzzy-headed: characterized by vague or confused thinking, dull-witted.
goofyQuirky or silly, often in a humorous manner; daft.
half-brainedExhibiting low intelligence, as if having only half a brain.
half-wittedHaving low intelligence.
hammer-headedStupid, ignorant.
idioticHaving the quality of idiocy; very foolish.
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...
mindless
monosynapticStupid, lacking in brainpower.
moronicBehaving in the manner of a moron; idiotic; stupid.
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 offensiveExtremely stupid; obtuse.
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.
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 stupid

adjectiveMore antonyms

intelligent
nonstupidNot stupid.

Meaning of stupid

adjective Lacking in intelligence.
adjective Exhibiting the quality of having been done by someone lacking in intelligence.
adjective Unpleasant; annoying to the speaker. This sense can be used alongside obscene words.

Full definition of stupid

stupid in other languages

Questions about synonyms of stupid

What is another word for stupid?: Stupid has 120 synonyms on Word.ws, such as wooden-headed, sheep-headed, foolish, dull-minded, bullet-headed, hammer-headed, dim-bulb and half-witted.
What is the opposite of stupid?: The opposite of stupid is nonstupid.
What does stupid mean?: Stupid means lacking in intelligence.

Adapted from Wiktionary: stupid (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.

Last updated: 2026-09-02

Cite this page: “Synonyms of stupid.” Word.ws, https://word.ws/synonyms/stupid. Based on Wiktionary, CC BY-SA 4.0.