The phrase "coming to be" refers to the process of something transitioning from non-existence to existence. There are a variety of synonyms that can be used to express this concept. One common phrase is "coming into existence." Another option is "being born," which typically refers to the creation of a living organism. "Emerging" and "arising" are also frequently used to describe the process of something coming to be. Additionally, "coming to life," "developing," "forming," and "materializing" can all be used to express the idea of something transitioning from non-existence to existence.