"Org" is a shortened form for the word "organization," which refers to a group or institution that has a particular purpose. There are several synonyms that can be used to replace "org," including association, society, club, foundation, institute, guild, and federation. Each of these terms is commonly used to describe a group of individuals or organizations that work together for a specific purpose, such as promoting a particular cause or advancing a particular field of study. By using different synonyms for "org," writers can add variety to their language and avoid using repetitive terminology in their writing.