Synonyms|155Antonyms|100|Broader|0Narrower|0Related|1.3k

14 entries under unsubstantiated topic. ×

9
groundless(adjective, reason, unwarranted, untrue, justification)
7
unfounded(adjective, unwarranted, untrue, flimsy)
5
idle(adjective, false, unwarranted, justification)
5
unconfirmed(adjective, unwarranted, untrue, flimsy)
5
unproven(adjective, groundless, unconfirmed, uncorroborated)
4
doubtful(adjective, questionable, unconfirmed, uncorroborated)
3
dubious(adjective, questionable, unconfirmed, uncorroborated)
3
flimsy(adjective, false, unwarranted, untrue, justification)
3
uncertain(adjective, questionable, unconfirmed, uncorroborated)
3
unverified(adjective, unconfirmed, uncorroborated)
1
foundationless(adjective, false, unwarranted, untrue, justification)
0
false(adjective, unwarranted, justification, groundless)
0
illogical(adjective, false, unwarranted, justification)
0
suspect(adjective, questionable, unconfirmed, uncorroborated)
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APASmart Define. (2015). unsupported thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/unsupported/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsupported thesaurus" https://smartdefine.org/unsupported/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, unsupported thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/unsupported/thesaurus/synonyms>.
MLASmart Define. "unsupported thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/unsupported/thesaurus/synonyms>