Memorandas, which are written records of information or communication, can be referred to by a variety of synonyms. One common synonym is "memos," which is short for "memorandum" and is often used in business settings to communicate important information within an organization. Another synonym is "notes," which can refer to both written records or brief reminders of information. "Reports" is another synonym that can be used to describe more formal and detailed records of information. Additionally, "records," "minutes," and "communications" can also be used interchangeably with "memorandas" to describe written documents that serve as a record of information.