The term "first-ever" refers to the initial occurrence of an event or phenomenon. Some synonyms for "first-ever" include inaugural, maiden, premiere, debut, and initial. These words all convey the idea that something is happening for the first time, and they can be used to describe a wide range of situations, from the launch of a new product to the opening of a new business. Using synonyms for "first-ever" can add variety and nuance to your writing, and help you to avoid repetition. By choosing the right synonym, you can emphasize the significance of a particular event or experience.