The word "un corroborated" refers to a statement or claim that is not supported by evidence. Antonyms for this word include "corroborated," meaning a statement or claim that is supported by evidence, "verified," meaning a statement or claim that has been confirmed as true by a reliable source, and "substantiated," meaning a statement or claim that has been proven to be true through evidence or data. Other antonyms include "authenticated," "confirmed," "established," "proven," and "validated." All these antonyms provide a sense of support and evidence for a statement or claim, which is the opposite of "un corroborated.