96 entries under adjective topic. ×

4
wild(foolish, unreasonable, illogical)
3
empty
3
ill-founded(worthless, unacceptable, inoperative, incapacitated)
3
reasonless(false, foolish, crazy, unreasonable)
3
sophistic(foolish, unreasonable, worthless, unacceptable)
3
specious(foolish, unreasonable, illogical)
3
speculative(unsubstantiated, unsupported, unfounded, groundless)
3
unreasonable(poor, foolish, worthless, unwarranted)
3
unsupportable(senseless, unwarranted, wanton, superfluous)
3
without foundation(expression, idiom, unsubstantiality)
2
dead
2
deceptive
2
erroneous
2
fallacious(poor, foolish, unreasonable, untrue)
2
foundationless(false, unwarranted, untrue, illogical)
2
insupportable
2
loose
2
nonexistent(real, fictional)
2
uncorroborated
2
wanton(unwarranted, unfounded, uncalled-for)
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APASmart Define. (2015). baseless thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/baseless/thesaurus/synonyms
ChicagoSmart Define. 2015. "baseless thesaurus" https://smartdefine.org/baseless/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, baseless thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/baseless/thesaurus/synonyms>.
MLASmart Define. "baseless thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/baseless/thesaurus/synonyms>