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Unsubstantiatable has 3 synonyms. The top synonyms for unsubstantiatable are unsupportable, unprovable, unsustainable. Another word for unsubstantiatable is unsupportable. Browse the full list below.
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| Random | DefinitionA common synonym for unsubstantiatable is unsupportable. Other synonyms include unprovable, unsustainable.
Unsubstantiatable has 3 synonyms listed on Thesaurasize.
(adj): lacking substantiation; without evidence
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