The phrase "other person" is commonly used to refer to someone other than oneself. However, there are various synonyms that can be used to convey this same meaning. Words such as "stranger", "outsider", "another", "peer", "colleague", "companion", "acquaintance", "associate", and "fellow being" are all alternative options to refer to someone else. Each of these words offers a slightly different connotation, and selecting the appropriate synonym will depend on the context in which it is being used. For example, "colleague" is often used in a professional setting, while "companion" implies a closer relationship and "outsider" refers to someone who is not a part of a particular group.