21
delusion(noun, trick, lie, reasoning, blunder)
20
casuistry(noun, trick, lie, reasoning, blunder)
20
chicanery(noun, trick, lie, reasoning, blunder)
20
deception(noun, trick, lie, reasoning, blunder)
20
deceptiveness(noun, trick, lie, reasoning, blunder)
20
fallacy(noun, trick, lie, reasoning, blunder)
20
speciousness(noun, trick, lie, reasoning, blunder)
20
spuriousness(noun, trick, lie, reasoning, blunder)
15
silly(adjective, characteristic, behavior, stupidity, silliness)
14
foolish(adjective, characteristic, behavior, stupidity, silliness)
12
error(noun, blunder, illusion, trickery, misconception)
12
hallucination(noun, blunder, illusion, trickery, misconception)
12
misapprehension(noun, blunder, illusion, trickery, misconception)
12
misconception(noun, blunder, illusion, trickery)
12
oversight(noun, blunder, illusion, trickery, misconception)
11
apparition(noun, blunder, illusion, trickery, misconception)
11
blunder(noun, illusion, trickery, misconception)
11
daydream(noun, blunder, illusion, trickery, misconception)
11
dream(noun, blunder, illusion, trickery, misconception)
11
eidolon(noun, blunder, illusion, trickery, misconception)
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APASmart Define. (2016). foolishness thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/foolishness/thesaurus/related
ChicagoSmart Define. 2016. "foolishness thesaurus" https://smartdefine.org/foolishness/thesaurus/related (accessed September 21, 2026).
HarvardSmart Define 2016, foolishness thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/foolishness/thesaurus/related>.
MLASmart Define. "foolishness thesaurus" 29 February 2016. Web. 21 September 2026. <https://smartdefine.org/foolishness/thesaurus/related>