Synonyms|150Antonyms|1|Broader|0Narrower|0Related|0
1
fatuous
1
goofy
1
hare-brained
1
imbecilic
1
inane
1
kooky(adjective, insane)
1
laughable
1
loco
1
ludicrous
1
meshuga
1
moronic
1
not all there
1
of unsound mind
1
off one's chump
1
off one's rocker
1
off one's trolley
1
psycho
1
ridiculous
1
risible
1
scatterbrained
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APASmart Define. (2013). crack-brained thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/crack-brained/thesaurus/synonyms
ChicagoSmart Define. 2013. "crack-brained thesaurus" https://smartdefine.org/crack-brained/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2013, crack-brained thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/crack-brained/thesaurus/synonyms>.
MLASmart Define. "crack-brained thesaurus" 17 June 2013. Web. 24 September 2026. <https://smartdefine.org/crack-brained/thesaurus/synonyms>