The term "accepted standard" can be used in various contexts, and there are several synonyms for it. One is "conventional norm," which implies a widely accepted measure or procedure for a particular situation. Another is "established criterion," which refers to a set of recognized rules or guidelines for assessing the quality or performance of something. "Official guideline" is also another term that can be used, particularly when referring to a document or policy issued by an authority or governing body. "Benchmark" is another synonym which implies a standard of excellence or achievement that serves as a reference point. Ultimately, these terms all convey a similar meaning to that of an accepted or recognized standard.