200 entries under stupid topic. ×

14
nitwitted(adjective, characteristic, foolish, senseless)
14
trivial(adjective, characteristic, slight, detail, small)
14
unintelligent(adjective, characteristic, weak, simple, slight)
13
balmy(adjective, characteristic, knowledge, slang, ability)
13
simpleminded(adjective, characteristic, foolish, senseless)
13
wacky(adjective, light, weak, simple, wrong)
13
impractical(adjective, characteristic, foolish, trivial)
13
inconsistent(adjective, characteristic, wrong, foolish)
12
loony(adjective, light, weak, simple, wrong)
12
sappy(adjective, soft, knowledge, slang, ability)
12
wild(adjective, wrong, strange, foolish)
11
imbecile(noun, adjective, dull, simple, fool)
11
thoughtless(adjective, feature, state, wrong, condition)
11
dumb(adjective, foolish, crazy, vague)
11
zany(adjective, weak, simple, knowledge, ability)
9
batty(adjective, light, wild, foolish)
9
shallow(adjective, slight, detail, small, foolish)
9
nuts(adjective, wild, foolish, crazy)
9
screwy(adjective, light, wild, foolish)
9
soft(adjective, tender, sweet, emotional)
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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>