The phrase "exists from" can be replaced in a variety of ways to enhance your writing, depending on its context. Words and phrases such as "originates from," "stems from," "arises from," and "derives from" can all be used to replace "exists from" and convey a similar meaning. Additionally, "emerges from," "comes from," "starts from," and "begins with" are suitable synonyms that can be used effectively. However, it is important to note that each of these phrases carries its unique meaning, so it is crucial to choose the appropriate synonym that best fits the context of your writing.