The term "out-group" refers to a group of individuals who are considered outsiders or are excluded from a particular social or cultural group. There are various synonyms for this term, such as "other," "foreign," "stranger," "alien," "excluded," and "marginalized." These words denote the sense of being different or disconnected from a particular group or society. Another commonly used synonym for "out-group" is "opposition," which suggests a sense of conflict or opposition between different groups or individuals. Regardless of which term is used, it's important to recognize and address the existence of these groups in order to create a more inclusive and welcoming society.