Soon-to-be is an expression which means "in the near future". It is commonly used to describe someone who is about to become or acquire something. There are many synonyms for the word soon-to-be, such as prospective, forthcoming, upcoming, imminent, about-to-be and on the horizon. These words can be used interchangeably depending on the context of the sentence. For example, a soon-to-be mother can also be referred to as an expectant mother or a forthcoming mother. Similarly, a soon-to-be graduate can also be referred to as a prospective graduate or an upcoming graduate. Therefore, selecting the right synonym can help you express yourself more accurately and effectively in any context.