The antonyms for the word "most corroborated" include unproven, unsubstantiated, baseless, unfounded, and unverified. These terms indicate a lack of credible evidence or support for a particular claim, theory, or assertion. When a statement is uncorroborated, it means that there is no reliable source or testimony to confirm its accuracy. Similarly, an unsubstantiated claim is one that lacks sufficient proof or validation. Both baseless and unfounded suggest a lack of logical or factual foundation, while unverified implies that something has not been subjected to adequate scrutiny or examination. Overall, antonyms for the term "most corroborated" highlight the importance of critical thinking, skepticism, and thorough research in assessing the validity of any given claim.