30 entries under unfounded topic. ×

20
groundless(adjective, reason, poor, foolish, true)
15
unwarranted(adjective, right, reasonable, true, untrue)
11
idle(adjective, false, true, hollow, unwarranted)
11
unjustified(adjective, unwarranted, untrue, illogical, deceptive)
9
bottomless(adjective, false, true, senseless, unwarranted)
9
gratuitous(adjective, false, unwarranted, untrue, necessary)
9
unsupported(adjective, false, unwarranted, untrue, substantiation)
7
uncalled-for(adjective, false, senseless, unwarranted, untrue)
5
indefensible(adjective, senseless, unwarranted, wanton, gratuitous)
4
invalid(adjective, foolish, unreasonable, worthless, unacceptable)
3
needless(unwarranted, unnecessary, wanton, unjustified)
3
reasonless(adjective, false, foolish, crazy, unreasonable)
3
speculative(adjective, unsubstantiated, unsupported, groundless)
3
unsupportable(adjective, senseless, unwarranted, wanton, superfluous)
2
foundationless(adjective, false, unwarranted, untrue, illogical)
2
wanton(adjective, unwarranted, uncalled-for)
1
assumed(adjective, senseless, unwarranted, wanton, superfluous)
1
causeless(adjective, false, senseless, unwarranted, justification)
1
superfluous(adjective, senseless, unwarranted, wanton, gratuitous)
1
unprovoked(adjective, false, senseless, unwarranted, justification)
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APASmart Define. (2015). baseless thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/baseless/thesaurus/synonyms
ChicagoSmart Define. 2015. "baseless thesaurus" https://smartdefine.org/baseless/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, baseless thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/baseless/thesaurus/synonyms>.
MLASmart Define. "baseless thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/baseless/thesaurus/synonyms>