53 entries under illogical topic. ×

20
groundless(adjective, reason, poor, foolish, true)
15
unfounded(adjective, false, foolish, true, crazy)
11
idle(adjective, false, true, hollow, unwarranted)
11
unjustified(adjective, unwarranted, untrue, deceptive)
9
bottomless(adjective, false, true, senseless, unwarranted)
9
gratuitous(adjective, false, unwarranted, untrue, necessary)
7
uncalled-for(adjective, false, senseless, unwarranted, untrue)
7
unsound(adjective, foolish, unreasonable, worthless, unacceptable)
4
invalid(adjective, foolish, unreasonable, worthless, unacceptable)
4
wild(adjective, foolish, unreasonable)
3
reasonless(adjective, false, foolish, crazy, unreasonable)
3
sophistic(adjective, foolish, unreasonable, worthless, unacceptable)
3
specious(adjective, foolish, unreasonable)
3
unreasonable(adjective, poor, foolish, worthless, unwarranted)
2
fallacious(adjective, poor, foolish, unreasonable, untrue)
2
foundationless(adjective, false, unwarranted, untrue)
2
senseless(foolish, unreasonable)
2
wrong(adjective, foolish, unreasonable, worthless, unacceptable)
1
crazy(foolish, unreasonable)
1
irrational(adjective, foolish, unreasonable, worthless, unacceptable)
<123>
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APASmart Define. (2015). baseless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/baseless/thesaurus/synonyms
ChicagoSmart Define. 2015. "baseless thesaurus" https://smartdefine.org/baseless/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, baseless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/baseless/thesaurus/synonyms>.
MLASmart Define. "baseless thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/baseless/thesaurus/synonyms>