Synonyms|230Antonyms|2|Broader|0Narrower|0Related|19
10
silly(adjective, foolish, crazy, zany)
9
foolish(adjective, silly, crazy, zany, wacky)
8
scatterbrained(noun, adjective, ignore, forget, vague)
7
crazy(adjective, silly, foolish, zany, wacky)
6
asinine
6
mad(adjective, silly, foolish, crazy, zany)
5
absurd(adjective, silly, foolish, crazy, laughing)
5
dizzy
5
idiotic
5
irrational(adjective, silly, foolish, crazy, zany)
5
nonsensical
5
nutty(adjective, silly, foolish, crazy, zany)
5
rattle-brained
5
stupid
5
wild(adjective, silly, foolish, crazy, zany)
4
flighty
4
frivolous
4
imbecilic
4
inane
4
insane(adjective, silly, foolish, crazy, zany)
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APASmart Define. (2013). hare-brained thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/hare-brained/thesaurus/synonyms
ChicagoSmart Define. 2013. "hare-brained thesaurus" https://smartdefine.org/hare-brained/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2013, hare-brained thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/hare-brained/thesaurus/synonyms>.
MLASmart Define. "hare-brained thesaurus" 19 May 2013. Web. 21 September 2026. <https://smartdefine.org/hare-brained/thesaurus/synonyms>