What is another word for subbase?
Pronunciation: [sˈʌbe͡ɪs] (IPA) 
The term "subbase" refers to the layer of material that is placed beneath the main layer of a road or pavement. This layer is designed to provide additional support and stability to the structure of the road. Synonyms for the word "subbase" include base course, foundation, bedding course, and subgrade. The type of material used for the subbase layer depends on the specific needs of the project, such as climate and traffic volume. Common materials used include gravel, crushed stone, asphalt, and concrete. The subbase layer plays a crucial role in ensuring the longevity and durability of a road or pavement structure.
