Synonyms for "flea-brained" (135 found)

Ranked by relevance and common usage.

Closest matches (27)

Adjective(27 words)

harebrainedaddlebrainedaddlepatedairheadedass-brainedbaby-brainedbee-brainedbeef-wittedbeefheadedbeetle-headedbirdbrainedblockheadedboeotianboneheadedboobilyboobyboofheadedbrainlessbubbleheadedbuffle-headed

Show 7 more words

bullet-headedcerebrally challengedchildishchowderheadedchuckleheadedcrackbrainedcretinous

Strong matches (41)

Adjective(41 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 21 more words

dumb as a sack of hammersdumb as an oxdumb as dirtdumber than a box of rocksdumber than a rockdunderheadedempty-headedfatheadedfatuousfeeble-mindedfoolishfuckwittedfuzzy-headedfuzzy-mindedhalf-brainedhalf-wittedhammer-headedheadassidioticimbecilicinane

Related words (67)

Adjective(67 words)

insipidintellectually challengedjolterheadedknuckleheadedlacklusterlamebrainedlowbrowlumpishlunkheadedmeatheadedmentally challengedmentally retardedmindlessmonosynapticmoronicmuttonheadednittynitwittednot the sharpest crayon in the boxnot the sharpest knife in the drawer

Show 47 more words

not the sharpest tool in the shednumbskulledoafishobtusepeabrainedprattypudding-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

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.