130 entries under foolish topic. ×

4
stolid(adjective, dull, slow, stupid)
4
trustful(plain, pure, innocent, naive)
4
vacuous(adjective, dull, slow, stupid)
3
daft(adjective, weak, slow, silly)
3
dotty(adjective, weak, silly, thoughtless)
3
insensate(adjective, dull, slow, silly)
3
unsuspecting(adjective, innocent, susceptible, naive)
2
careless(adjective, silly, senseless, artless)
2
crazy(adjective, weak, silly, stupid)
2
daffy(adjective, weak, slow, silly)
2
forgetful(adjective, silly, senseless, unnecessary)
2
half-baked(adjective, dull, weak, slight, slow)
2
indiscreet(dull, weak, silly, thoughtless)
2
jerky(adjective, weak, silly, thoughtless)
2
ludicrous(adjective, dull, weak, silly)
2
mark(innocent, susceptible, naive, trusting)
2
mentally deficient(expression, silly, stupid)
2
mentally handicapped(expression, silly, stupid)
2
sucker(fool, innocent, susceptible, naive)
2
trivial(adjective, dull, slight, lower, obscure)
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APASmart Define. (2016). simple thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/simple/thesaurus/synonyms
ChicagoSmart Define. 2016. "simple thesaurus" https://smartdefine.org/simple/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, simple thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/simple/thesaurus/synonyms>.
MLASmart Define. "simple thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/simple/thesaurus/synonyms>