What is another word for underbuildings?
Pronunciation: [ˌʌndəbˈɪldɪŋz] (IPA) 
Underbuildings is a term used to describe the parts of a building that are below ground level, such as basements or cellars. These parts of a building are also commonly referred to as substructures or foundations. Other synonyms for underbuildings include subterranea, underground structures, sub-surface structures and below-ground components. While these words all refer to the same concept, the choice of which word to use is often dependent on the context and level of formality. Ultimately, regardless of the term used, underbuildings provide essential support and functionality to a building, ensuring its overall stability and durability.
