Milled lead is a heavy metal material that is commonly used in roofing, flashing, and other construction applications. As a compound, it has no antonyms since it is a specific type of metal. However, if we look at the components that make up milled lead such as the malleability, weight, or durability, there may be some antonyms that we can relate to it. For instance, lightweight, brittle, and flexible can be regarded as antonyms of milled lead. Therefore, when looking for alternatives to milled lead, one has to consider the properties and functionalities that come with the material.