"Who's Who" is a popular term used to describe a list of influential or famous individuals. However, there are many synonyms for this phrase, including "elite circle," "power players," "in-crowd," "movers and shakers," "the cream of the crop," and "celebrity clique." Each of these phrases emphasizes the exclusivity and status associated with being part of this group. Whether referring to business leaders, politicians, artists, or any other subset of society, using one of these synonyms can add a touch of sophistication and intrigue to your language.