There are several synonyms for the phrase "written testimonies," which refers to statements or accounts written by someone about a particular event, experience or topic. Some of these synonyms include written accounts, declarations, affidavits, statements, narratives, reports, and stories. All of these terms refer to written documents that are used to convey information about something that has happened. Depending on the context, one of these synonyms may be more appropriate than the others. For example, affidavits are usually used in a legal context and are sworn under oath, while narratives might be used more in a creative writing context. Ultimately, the synonym chosen will depend on the purpose of the written testimony and the context in which it is being presented.