11
sophistical(adjective, mad, unreasonable, irrational, trifling)
10
fallacious(adjective, correct, wrong, false, true)
10
specious(adjective, correct, foolish, true, unreasonable)
8
invalid(adjective, correct, foolish, true, unreasonable)
8
misleading(adjective, mad, unreasonable, irrational, fallacious)
7
deceptive(adjective, mad, unreasonable, irrational, fallacious)
7
false(adjective, correct, true, fallacious)
7
illogical(adjective, correct, foolish, sense, true)
7
irrational(adjective, foolish, mad, unreasonable, senseless)
7
unsound(adjective, correct, foolish, true, unreasonable)
5
mad(adjective, foolish, unreasonable, irrational, worthless)
5
unreasonable(adjective, foolish, mad, irrational, worthless)
4
groundless(adjective, foolish, unreasonable, irrational, illogical)
4
reasonless(adjective, foolish, mad, unreasonable, irrational)
3
baseless(adjective, foolish, unreasonable, worthless, unacceptable)
3
captious
3
casuistic
3
casuistical
3
circular
3
fraudulent(adjective, mad, unreasonable, irrational, fallacious)
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APASmart Define. (2015). sophistic thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sophistic/thesaurus/synonyms
ChicagoSmart Define. 2015. "sophistic thesaurus" https://smartdefine.org/sophistic/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, sophistic thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sophistic/thesaurus/synonyms>.
MLASmart Define. "sophistic thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/sophistic/thesaurus/synonyms>