The phrase "said to be" is often used to convey information that is not necessarily confirmed or proven. Synonyms for this phrase could include "purportedly," "reportedly," "allegedly," or "supposedly." These synonyms suggest that the information being conveyed may not be entirely reliable, as it is based on what others have said or believed. Other options might include "rumored," "claimed," "asserted," or "presumed," all of which indicate that the veracity of the statement has yet to be fully determined. Choosing the right synonym can help to clarify the level of certainty or uncertainty surrounding a particular piece of information.