60 entries under foolish topic. ×

66
invalid(adjective, feature, state, correct, condition)
26
irrational(adjective, wrong, reason, false, silly)
25
unreasonable(adjective, wrong, reason, poor, false)
21
absurd(adjective, wrong, wild, strange, silly)
17
unsound(adjective, correct, wrong, false, silly)
15
senseless(adjective, wrong, silly, sense)
15
silly(adjective, wrong, stupid, crazy)
13
incoherent(adjective, wrong, strange, stupid)
13
mad(adjective, wrong, false, silly)
13
disconnected(adjective, separate, unreasonable, detached)
11
disjointed(adjective, unreasonable, detached, confused)
11
groundless(adjective, reason, poor, sense)
11
ridiculous(adjective, wrong, silly, stupid)
9
specious(adjective, correct, false, sense)
8
crazy(adjective, wrong, silly, stupid)
8
ludicrous(adjective, silly, stupid, crazy)
8
nonsensical(adjective, wrong, silly, stupid)
7
idiotic(adjective, silly, stupid, insignificant)
7
stupid(adjective, wrong, silly, crazy)
7
unthinking(adjective, unreasonable, thoughtless)
<123>
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APASmart Define. (2015). illogical thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/illogical/thesaurus/synonyms
ChicagoSmart Define. 2015. "illogical thesaurus" https://smartdefine.org/illogical/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, illogical thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/illogical/thesaurus/synonyms>.
MLASmart Define. "illogical thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/illogical/thesaurus/synonyms>