47 entries under irrational topic. ×

2
cockamamie(adjective, weak, great, simple, extraordinary)
2
daring(adjective, careless, wild, bold, thoughtless)
2
kooky(adjective, weak, great, simple, extraordinary)
2
lunatic(adjective, weak, simple, knowledge, ability)
2
potty(adjective, wild, silly, foolish, stupid)
2
venturesome(adjective, careless, wild, bold, thoughtless)
1
batty(adjective, keen, warm, slow, wild)
1
cracked(adjective, wild, silly, foolish, stupid)
1
deranged(adjective, wild, silly, foolish, stupid)
1
devil-may-care(adjective, careless, wild, foolish, immoral)
1
eccentric(adjective, keen, warm, wild, strange)
1
headstrong(adjective, careless, bold, thoughtless, impulsive)
1
impetuous(adjective, careless, bold, thoughtless, impulsive)
1
nuts(adjective, wild, silly, foolish, stupid)
1
precipitate(adjective, careless, wild, bold, thoughtless)
1
temerarious(adjective, careless, wild, bold, thoughtless)
1
touched(adjective, wild, silly, foolish, stupid)
1
unusual(adjective, keen, warm, silly, foolish)
1
venturous(adjective, careless, wild, bold, thoughtless)
0
bedlamite(adjective, keen, warm, silly, foolish)
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APASmart Define. (2015). harebrained thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/harebrained/thesaurus/synonyms
ChicagoSmart Define. 2015. "harebrained thesaurus" https://smartdefine.org/harebrained/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, harebrained thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/harebrained/thesaurus/synonyms>.
MLASmart Define. "harebrained thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/harebrained/thesaurus/synonyms>