Newton Mackintosh, Lucy Lake Poor Lucy Lake was overgrown, / But somewhat underbrained. / She did not know enough, I own, / To go in when it rained.
Source: wiktionary
Underbrained
Synonyms for "underbrained" (122 found)
Ranked by relevance and common usage.
Closest matches (25)
Strong matches (36)
Related words (61)
Adjective(61 words)
inaneinsipidintellectually challengedknuckleheadedlamebrainedlowbrowlumpishlunkheadedmentally challengedmentally retardedmindlessmonosynapticmoronicmuttonheadednitwittednot the sharpest crayon in the boxnot the sharpest knife in the drawernot the sharpest tool in the shednumbskulledoafish
Show 41 more words
obtusepeabrainedprattypudding-headedpuerilepurblindquarter-wittedretardedrockheadedsharp as a bowling ballsheep-headedshit-for-brainssimpleslowslow on the uptakeslow-wittedsmooth-brainedstolidstupidthickthick as a brickthick as a plankthick as a whale omelettethick as champthick as mincethick as pig shitthick as two short planksthick-skulledthickheadedthickwittedunapprehensiveuncleverunintelligentunsmartvacantvacuouswitlesswooden-headedwool-headedwoolly-headedwoolly-minded
Sample sentences
2 total sentences available.
I hope that even a species as underbrained as yours can understand that survival is a very good idea.
Source: wiktionary
Keep exploring
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.