2
baselessly
2
gratuitously
2
groundlessly(adverb, reason)
2
idly
2
unwarrantedly(adverb, reason)
1
causelessly
1
deadly
1
deceptively
1
erroneously
1
fallaciously
1
falsely
1
illogically
1
indefensibly
1
indifferently
1
inequitably
1
insupportably
1
libelously
1
lightly
1
mendaciously
1
misleadingly
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APASmart Define. (2013). unfoundedly thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unfoundedly/thesaurus/synonyms
ChicagoSmart Define. 2013. "unfoundedly thesaurus" https://smartdefine.org/unfoundedly/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, unfoundedly thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unfoundedly/thesaurus/synonyms>.
MLASmart Define. "unfoundedly thesaurus" 19 May 2013. Web. 20 September 2026. <https://smartdefine.org/unfoundedly/thesaurus/synonyms>