105 entries under simple topic. ×

20
unreasonable(adjective, characteristic, weak, wrong)
19
moronic(adjective, weak, knowledge, ability)
18
unwise(adjective, characteristic, weak, wrong)
18
idiot(noun, person, fool, innocent)
16
imprudent(adjective, characteristic, weak, careless)
16
harebrained(adjective, characteristic, weak, knowledge)
16
nutty(adjective, light, weak, wrong)
14
unintelligent(adjective, characteristic, weak, slight)
13
wacky(adjective, light, weak, wrong)
12
loony(adjective, light, weak, wrong)
11
imbecile(noun, adjective, dull, fool)
11
zany(adjective, weak, knowledge, ability)
8
cockamamie(adjective, weak, foolish, crazy)
8
dopey(adjective, knowledge, slang, ability)
7
dotty(adjective, weak, foolish, stupid)
7
insensate(adjective, dull, ability, stupid)
6
daffy(adjective, foolish, stupid, crazy)
6
dolt(noun, fool, innocent, jerk)
6
half-baked(adjective, slight, detail, foolish)
6
kooky(adjective, weak, foolish, crazy)
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APASmart Define. (2016). silly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/silly/thesaurus/synonyms
ChicagoSmart Define. 2016. "silly thesaurus" https://smartdefine.org/silly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, silly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/silly/thesaurus/synonyms>.
MLASmart Define. "silly thesaurus" 20 January 2016. Web. 22 September 2026. <https://smartdefine.org/silly/thesaurus/synonyms>