Synonyms|292Antonyms|6|Broader|0Narrower|0Related|139

23 entries under unfounded topic. ×

5
causeless(adjective, senseless, unwarranted, wanton, superfluous)
5
invalid(adjective, foolish, unreasonable, irrational, worthless)
4
baseless(adjective, false, foolish, crazy, unreasonable)
4
gratuitous(adjective, unwarranted, untrue, flimsy, necessary)
2
bottomless(adjective, senseless, unwarranted, untrue, flimsy)
1
assumed(adjective, senseless, unwarranted, wanton, superfluous)
1
groundless(adjective, foolish, crazy, unreasonable, senseless)
1
not necessary(expression, adjective, senseless, unwarranted, wanton)
1
supererogatory(adjective, senseless, unwarranted, wanton, superfluous)
1
superfluous(adjective, senseless, unwarranted, wanton, gratuitous)
1
ungrounded(mad, unreasonable, irrational, unwarranted, untrue)
1
unjustified(unwarranted, untrue, flimsy, wanton, unsubstantiated)
1
unprovoked(adjective, senseless, unwarranted, wanton, superfluous)
1
unsupportable(adjective, senseless, unwarranted, wanton, superfluous)
1
unwarranted(untrue, flimsy, wanton, unsubstantiated)
0
indefensible(adjective, senseless, unwarranted, wanton, superfluous)
0
inessential(unwarranted, wanton, uncalled-for)
0
needless(unwarranted, wanton, uncalled-for)
0
uncalled-for(adjective, senseless, unwarranted, wanton, superfluous)
0
uncalled for(expression, adjective, groundless, unprovoked)
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ChicagoSmart Define. 2015. "reasonless thesaurus" https://smartdefine.org/reasonless/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, reasonless thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/reasonless/thesaurus/synonyms>.
MLASmart Define. "reasonless thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/reasonless/thesaurus/synonyms>