Entryism, also known as infiltration or subversion, refers to a strategy of a group or political party joining an organization with the intention of taking control of its policies and decision-making processes. Some synonyms for entryism include insinuation, incursion, invasion, penetration, and encroachment. Other related terms include subterfuge, stealth, and surreptitious. Entryism is often associated with communist and socialist parties, although it can be used by any group seeking to exert influence over an organization. It can be seen as a controversial tactic, with some individuals viewing it as a form of subversion and others seeing it as a legitimate way of influencing change within an organization.