In order to ſet ſo hopeful a Genius right in this matter, vve have ſent you an anſvver to the ill-grounded Sophiſms of thoſe crack brain'd fellovvs, and likevviſe an eaſy mechanical explication of Perception or Thinking.
Source: wiktionary
Crackbrained
Synonyms for "crackbrained" (183 found)
Ranked by relevance and common usage.
Closest matches (37)
Strong matches (55)
Adjective(45 words)
datelessdensedenteddimdim-bulbdim-headeddim-witteddoltishdopeydozydrowsydulldull-headeddull-mindeddull-witteddumbdumb as a bag of hammersdumb as a box of rocksdumb as a doorknobdumb as a post
Show 25 more words
dumb as a sack of hammersdumb as an oxdumb as dirtdumber than a box of rocksdumber than a rockdunderheadedempty-headedfatheadedfatuousfeeble-mindedflea-brainedfoolishfuckwittedfuzzy-headedfuzzy-mindedhalf-brainedhalf-wittedhammer-headedheadassidioticimbecilicinaneinsipidintellectually challengedjolterheaded
Adjective(1 words)
Related words (91)
Adjective(64 words)
knuckleheadedlacklusterlamebrainedlowbrowlumpishlunkheadedmeatheadedmentally challengedmentally retardedmindlessmonosynapticmoronicmuttonheadednittynitwittednot the sharpest crayon in the boxnot the sharpest knife in the drawernot the sharpest tool in the shednumbskulledoafish
Show 44 more words
obtusepeabrainedprattypudding-headedpuerilepurblindquarter-wittedretardedrockheadedsharp as a bowling ballsheep-headedshit-for-brainssimpleslowslow on the uptakeslow-wittedsluggishsmooth-brainedstolidstupidthickthick as a brickthick as a plankthick as a whale omelettethick as champthick as mincethick as pig shitthick as two short planksthick-skulledthickheadedthickwittedunapprehensiveuncleverunderbrainedunintelligentunsmartvacantvacuouswitlesswooden-headedwoodenheadedwool-headedwoolly-headedwoolly-minded
Related word relations
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
Translations
2 translations across 1 languages.
Bulgarian
2 entries- побъркан adj (idiotic)
- слабоумен adj (idiotic)
Sample sentences
5 total sentences available.
By degrees, Jean Paul began to be considered not a strange, crackbrained mixture of enthusiast and buffoon, but a man of infinite humour, sensibility, force, and penetration.
Source: wiktionary
Could it be, after all, that the whole story was true, and the writing on the sherd was not a forgery, or the invention of some crack-brained, long-forgotten individual?
Source: wiktionary
He shook his head; the milk pail was still at his feet. «You always been a crackbrained sonofabitch anyhow.»
Source: wiktionary
Showing 4 of 5 available sentences.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.