58 entries under silly topic. ×

7
ignorant(adjective, dull, simple, slow)
6
empty-headed(adjective, simple, foolish, stupid)
6
backward(adjective, dull, simple, slow)
6
daft(adjective, simple, slow, foolish)
6
half-baked(adjective, dull, simple, slow)
6
imbecile(adjective, dull, simple, foolish)
6
senseless(adjective, dull, simple, slow)
5
mindless(adjective, dull, simple, slow)
4
simple-minded(adjective, dull, simple, slow)
4
daffy(adjective, simple, slow, foolish)
3
opaque(adjective, dull, foolish, stupid)
3
fat(adjective, stupid, green, thick)
3
insensate(adjective, dull, simple, slow, informal)
3
scatterbrained(adjective, simple, slow, foolish)
3
sluggish(adjective, dull, simple, slow)
2
heavy(adjective, dull, stupid, impassive)
2
credulous(adjective, stupid, green, fat)
2
inexperienced(adjective, stupid, green, fat)
2
nitwitted(adjective, stupid, green, fat)
2
simpleminded(adjective, dull, simple, foolish)
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APASmart Define. (2016). dumb thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/dumb/thesaurus/synonyms
ChicagoSmart Define. 2016. "dumb thesaurus" https://smartdefine.org/dumb/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, dumb thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/dumb/thesaurus/synonyms>.
MLASmart Define. "dumb thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/dumb/thesaurus/synonyms>