The term "non-member" refers to someone who is not a member of a particular group or organization. There are several synonyms for this term, including outsider, non-participant, non-affiliate, non-subscriber, and non-associate. These words are often used interchangeably and can be used in various contexts, such as business, politics, and social organizations. The use of these synonyms helps to provide clarity in communication and avoids confusion or misunderstandings. It is important to choose the appropriate synonym depending on the context in which it is being used and to ensure that the meaning is accurately conveyed.