4
wrong(adjective, false, foolish, unreasonable, irrational)
3
circular
3
contrary(adjective, uncertain, irregular, conflicting, incompatible)
3
empty-headed(adjective, thoughtless)
3
farcical(adjective, absurd)
3
flimsy(adjective, poor, false, unwarranted, justification)
3
heretical
3
heterodox
3
illegitimate
3
improbable(adjective, poor, wild, unreasonable, fantastic)
3
indefensible(adjective, defended, verbal attack)
3
jumbled(adjective, strange, fantastic, detached, irregular)
3
nonrational(adjective, impulse, intuition, thoughts)
3
not following(expression, adjective, idiom, sense, reasoning)
3
nutty(adjective, wrong, silly, foolish, sense)
3
outrageous(adjective, defended, verbal attack)
3
sappy(adjective, foolish, sentimental)
3
sophistical(adjective, sense, mad, unreasonable, irrational)
3
spurious(adjective, correct, sense, true)
3
unacceptable(adjective, defended, verbal attack)
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APASmart Define. (2015). illogical thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/illogical/thesaurus/synonyms
ChicagoSmart Define. 2015. "illogical thesaurus" https://smartdefine.org/illogical/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, illogical thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/illogical/thesaurus/synonyms>.
MLASmart Define. "illogical thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/illogical/thesaurus/synonyms>