250 entries under adjective topic. ×

3
thoughtless(silly, foolish, stupid, senseless)
3
tomfool(knowledge, ability, foolish)
3
weak(simple, silly, foolish, thoughtless)
3
weak-minded
3
zany(weak, simple, knowledge, ability)
2
attocerebral
2
backward(simple, slow, foolish, stupid)
2
balmy(knowledge, slang, ability, impractical)
2
barmy
2
bird-brained
2
cockeyed(knowledge, ability, informal, impractical)
2
cuckoo
2
dim(dull, simple, slow, unintelligent)
2
fantastic(weak, simple, silly, foolish)
2
farcical
2
feather-brained
2
harebrained(weak, simple, knowledge, ability)
2
imprudent(weak, simple, silly, foolish)
2
irresponsible(foolish, stupid, impractical, half-baked)
2
loopy(knowledge, ability, informal, foolish)
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APASmart Define. (2015). imbecilic thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/imbecilic/thesaurus/synonyms
ChicagoSmart Define. 2015. "imbecilic thesaurus" https://smartdefine.org/imbecilic/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, imbecilic thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/imbecilic/thesaurus/synonyms>.
MLASmart Define. "imbecilic thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/imbecilic/thesaurus/synonyms>