A snap line is a tool used in construction and woodworking industries to make straight and accurate lines. It is also known as a chalk line or a snap chalk. Other synonyms for this term include string line, marking line, builder's line, and even plumb line, which is used to ensure vertical alignment. The term "snap" refers to the action of snapping or pulling the line, which is coated with chalk, to create a visible mark on the surface. With each pull, the snap line produces a sharp and clear boundary that provides a guide to the worker to make precise cuts or measurements. The use of snap lines is an essential aspect of various construction and woodworking tasks, making it imperative to know the synonyms associated with this tool.