200 entries under stupid topic. ×

3
undiscerning(adjective, careless, unthinking, obtuse)
3
unproductive(adjective, insignificant, useless, senseless)
3
vacant(adjective, indifferent, foolish, senseless)
2
careless(adjective, foolish, vague, senseless)
2
purposeless(adjective, insignificant, useless, senseless)
2
contradictory(adjective, foolish, senseless, absurd)
2
dense(adjective, dull, simple, foolish)
2
doltish(adjective, weak, simple, careless, foolish)
2
erratic(adjective, wrong, wild, foolish)
2
excessive(adjective, unreasonable, absurd, expensive)
2
fruitless(adjective, insignificant, useless, senseless)
2
illiterate(noun, adjective, simple, fool)
2
inadvertent(careless, unthinking, obtuse, unperceptive)
2
inattentive(adjective, slight, detail, careless, foolish)
2
ineffective(adjective, insignificant, useless, senseless)
2
moonstruck(adjective, soft, tender, sweet, wild)
2
neglectful(adjective, careless, foolish, senseless)
2
obtuse(adjective, careless, foolish, senseless)
2
odd(adjective, wild, strange, foolish)
2
of unsound mind(expression, idiom, foolish, mad)
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APASmart Define. (2016). silly thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/silly/thesaurus/synonyms
ChicagoSmart Define. 2016. "silly thesaurus" https://smartdefine.org/silly/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, silly thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/silly/thesaurus/synonyms>.
MLASmart Define. "silly thesaurus" 20 January 2016. Web. 26 September 2026. <https://smartdefine.org/silly/thesaurus/synonyms>