What is the opposite of unsubstantiated?

Need antonyms for unsubstantiated? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Opposite of not supported or proven by evidence
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Adjective
Opposite of based on or calculated through theory rather than experience or practice
Adjective
Opposite of making or spreading scandalous claims about someone with the intention of damaging their reputation
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