Synonyms|288Antonyms|134|Broader|5Narrower|7Related|1.5k
1
superfluous(adjective, useless, senseless, unwarranted, unnecessary)
1
supposed
1
trivial(adjective, poor, thin, false, empty)
1
unacceptable(adjective, defended, verbal attack)
1
unascertained
1
unauthenticated
1
uncertified
1
unconfirmed
1
undemonstrated
1
undetermined
1
unendurable
1
unestablished
1
unexplainable(adjective, defended, verbal attack)
1
unfixed
1
unhelpful(adjective, empty, senseless, worthless, unwarranted)
1
unnecessary(adjective, useless, empty, senseless, worthless)
1
unreasoned
1
unruly
1
unscientific
1
unsettled
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ChicagoSmart Define. 2015. "groundless thesaurus" https://smartdefine.org/groundless/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, groundless thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/groundless/thesaurus/synonyms>.
MLASmart Define. "groundless thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/groundless/thesaurus/synonyms>