The antonyms for the word de-bunked can be thought of as "confirmed," "validated," "affirmed," "corroborated," "authenticated," or "established." These words all suggest that something that was once doubted or questioned has been shown to be true or accurate. In contrast, de-bunked means that something has been exposed as false or fraudulent. Therefore, its antonyms all imply a sense of certainty or validity. By using one of these antonyms in place of de-bunked, we can communicate that we believe something to be true or trustworthy, rather than casting doubt or suspicion.