When it comes to construction and carpentry, plumb lines are an essential tool. However, there are different synonyms for this tool that are also commonly used. From pointed string to plummet and from plummet line to perpendicular, these words are interchangeably used when referring to plumb lines. In addition, this tool is also commonly referred to as a spirit level, which is used to determine the level of something. No matter which synonym you choose, the purpose of this tool remains the same - to ensure that whatever is being constructed is level and straight. So whether you are a DIY enthusiast or a seasoned carpenter, plumb lines, or any of their synonyms, are a crucial tool to have in your arsenal.