1
for the birds(expression, idiom, extraordinary, amazing, dubious)
1
forward
1
freakish
1
frenzied(careless, thoughtless, impulsive, reckless, hasty)
1
fribble
1
full of holes(expression, idiom, extraordinary, amazing, dubious)
1
furious(careless, thoughtless, impulsive, reckless, hasty)
1
giddy-brained
1
giddy-headed
1
giddy-pated
1
giddy-witted
1
harebrain
1
hasty(careless, wild, thoughtless, impulsive, reckless)
1
headstrong(adjective, careless, bold, thoughtless, impulsive)
1
hoity-toity
1
hotheaded(careless, wild, silly, crazy, thoughtless)
1
humorsome
1
ignorant(stupid, impulsive, absurd, impractical, half-baked)
1
ill-advised(weak, simple, careless, wild, foolish)
1
ill-conceived(silly, foolish, fantastic, impulsive, unwise)
11 years ago|16k views|share |citing 
APASmart Define. (2015). harebrained thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/harebrained/thesaurus/synonyms
ChicagoSmart Define. 2015. "harebrained thesaurus" https://smartdefine.org/harebrained/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, harebrained thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/harebrained/thesaurus/synonyms>.
MLASmart Define. "harebrained thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/harebrained/thesaurus/synonyms>