The phrase "lays first stone" is often used to describe the initial step in a construction project, but there are several synonyms that can be used to convey the same idea. One such synonym is "commences building," which indicates the start of the construction process. "Initiates construction" is another alternative, emphasizing the beginning of the project. "Begins groundwork" denotes the start of the preparatory work needed before actual construction starts. Additionally, "breaks ground" is a common phrase used to describe the same process, with a focus on the literal breaking of the soil. All of these synonyms capture the notion of starting a new construction project and the excitement that comes with it.