The term "first round" generally refers to the initial stage or phase of a process or event. However, there are various synonyms that can be used to describe this stage, depending on the context. Some options include the "opening round," "initial phase," "preliminary stage," "starting point," "beginning round," or simply the "first stage." These alternatives can provide more nuanced or descriptive language in specific situations. For example, "preliminary stage" may be used in a scientific study, while "opening round" could be used in a sports context. Utilizing synonyms can add variety and clarity to writing and speech.