The phrase "any one" can be substituted by several synonyms, depending on the context in which it is being used. For example, "any one" can be replaced by "anybody," "any person," or "any individual" while referring to people. Similarly, while talking about things, "any one" can be replaced by "any item," "any object," or "any article." Additionally, "any one" can be replaced by "any of them," "whichever one," or "either one" while making a choice between different options. It is important to use the appropriate synonym based on the context to avoid any confusion.