FRWL is an acronym for For Research and Writing Purposes Only, and as such, there are no synonyms for it. However, there are similar terms and phrases that may be used in place of it, such as "not for publication," "not for distribution," "for internal use only," and "confidential information." These phrases indicate that the information being provided is only to be used for specific purposes and should not be shared with others or distributed publicly. It is important to respect these restrictions and use the information appropriately to maintain trust and credibility with the source of the information.