40 entries under silly topic. ×

19
idiotic(adjective, dull, simple, foolish)
17
fatuous(adjective, foolish, stupid, crazy)
14
moronic(adjective, dull, simple, slow)
14
stupid(noun, adjective, dull, simple, slow)
12
foolish(adjective, dull, simple, stupid)
9
inane(adjective, dull, simple, foolish)
9
ludicrous(adjective, foolish, stupid, unintelligent)
9
simple(noun, adjective, dull, ability, slow)
8
asinine(adjective, dull, simple, foolish)
7
backward(adjective, dull, simple, slow)
7
senseless(adjective, dull, foolish, stupid)
7
slow(adjective, dull, simple, foolish)
6
brainless(adjective, dull, simple, foolish)
6
dull(adjective, simple, slow, foolish)
6
witless(adjective, dull, simple, foolish)
5
dumb(adjective, dull, simple, foolish)
5
simple-minded(adjective, dull, simple, slow)
4
feeble(adjective, weak, stupid, green)
4
half-witted(adjective, dull, simple, slow)
4
thick(adjective, dull, simple, foolish)
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APASmart Define. (2015). imbecile thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/imbecile/thesaurus/synonyms
ChicagoSmart Define. 2015. "imbecile thesaurus" https://smartdefine.org/imbecile/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, imbecile thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/imbecile/thesaurus/synonyms>.
MLASmart Define. "imbecile thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/imbecile/thesaurus/synonyms>