Synonyms|56Antonyms|3|Broader|0Narrower|0Related|43
3
groundless(adjective, reason, false, unwarranted, untrue)
2
baseless(adjective, substantiation)
2
illogical(adjective, false, unwarranted, untrue, justification)
2
unwarranted(adjective, right, reasonable)
1
false(adjective, unwarranted, untrue, justification, illogical)
1
flimsy(adjective, false, unwarranted, untrue, justification)
1
idle(adjective, false, unwarranted, untrue, justification)
1
invalid
1
uncorroborated
1
unfounded
1
unsupported(adjective, false, unwarranted, untrue, justification)
1
vacillant
0
bogus
0
causeless(adjective, false, unwarranted, justification, unsupported)
0
chimerical(adjective, false, unwarranted, justification, unsupported)
0
counterfeit
0
deceitful
0
deceptive
0
dishonest
0
empty
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APASmart Define. (2013). foundationless thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/foundationless/thesaurus/synonyms
ChicagoSmart Define. 2013. "foundationless thesaurus" https://smartdefine.org/foundationless/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, foundationless thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/foundationless/thesaurus/synonyms>.
MLASmart Define. "foundationless thesaurus" 17 June 2013. Web. 20 September 2026. <https://smartdefine.org/foundationless/thesaurus/synonyms>