The term "back way" can be replaced with several synonyms based on the context. In informal language, it can be substituted with "backroad," "shortcut," or "secret passage." For a more formal or professional setting, alternatives may include "diversion route," "alternative route," or "detour." Depending on the context, "back way" can also be replaced with "retreat," "withdrawal," or "backtrack." However, these synonyms imply a different meaning, such as a physical movement or a change in decision. Therefore, it is important to consider the context and use the appropriate synonym for the intended meaning.