84 entries under simple topic. ×

11
indiscreet(adjective, dull, weak, offensive)
10
daffy(adjective, weak, silly, stupid)
10
fantastic(adjective, weak, wild, strange)
10
half-witted(adjective, dull, weak, slow)
10
incautious(adjective, weak, careless, silly)
10
unthinking(adjective, dull, wrong, slight)
9
harebrained(adjective, weak, knowledge, ability)
8
half-baked(adjective, dull, stupid, fantastic)
8
ignorant(adjective, slight, rough, silly)
8
lunatic(adjective, weak, knowledge, ability)
8
nuts(adjective, rough, wild, strange)
8
weak(adjective, silly, thoughtless, absurd)
7
jerky(adjective, weak, knowledge, slang)
7
kooky(adjective, weak, wrong, wild)
7
meaningless(adjective, dull, slight, slow)
7
thick(adjective, dull, slow, silly)
7
trivial(adjective, dull, slight, offensive)
6
cockamamie(adjective, weak, wrong, silly)
6
flighty(adjective, slight, careless, silly)
6
giddy(adjective, rough, careless, silly)
10 years ago|43k views|share |citing 
APASmart Define. (2016). foolish thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/foolish/thesaurus/synonyms
ChicagoSmart Define. 2016. "foolish thesaurus" https://smartdefine.org/foolish/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, foolish thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/foolish/thesaurus/synonyms>.
MLASmart Define. "foolish thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/foolish/thesaurus/synonyms>