142 entries under foolish topic. ×

8
erratic(adjective, unusual, wild, strange, silly)
8
irrational(adjective, weak, simple, informal, unusual)
8
witless(adjective, informal, crazy, mad)
7
brainless(weak, simple, silly, unreasonable)
7
cockamamy(adjective, silly, thoughtless, unwise)
7
ridiculous(adjective, light, weak, simple, wrong)
7
stupid(adjective, weak, simple, wrong, wild)
6
touched(adjective, unusual, wild, strange, silly)
6
cockeyed(adjective, knowledge, ability, informal, silly)
6
inane(adjective, wild, silly, stupid)
6
ludicrous(adjective, light, weak, simple, wild)
6
peculiar(adjective, informal, unusual, strange)
6
potty(adjective, wild, silly, stupid)
6
screwball(noun, silly, crazy, mad)
5
fantastic(adjective, weak, simple, informal, unusual)
5
flaky(adjective, light, wrong, unusual, wild)
5
harebrained(adjective, weak, simple, knowledge, ability)
5
psycho(noun, silly, crazy, mad)
5
strange(adjective, unusual, silly, odd)
5
unreasonable(adjective, weak, simple, wrong, silly)
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APASmart Define. (2016). wacky thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/wacky/thesaurus/synonyms
ChicagoSmart Define. 2016. "wacky thesaurus" https://smartdefine.org/wacky/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, wacky thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/wacky/thesaurus/synonyms>.
MLASmart Define. "wacky thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/wacky/thesaurus/synonyms>