Synonyms of the word 
UNSUBSTANTIATED → UNCORROBORATED - UNSUPPORTED
unsubstantiated
- adj. Lacking substantiation; without evidence.
uncorroborated
- adj. Not corroborated.
unsupported
- adj. Without physical support.
- adj. For which support or help is not available.
- adj. Without confirmation from a credible source, without verifying support.
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