Basements are a versatile space within a home that can have multiple purposes. Some common synonyms for basements include cellar, underground room, sub-basement, foundation level, subterranean space and bottom floor. A cellar is typically used for storage of food and drink, while an underground room can have a variety of uses. A sub-basement is often found in commercial buildings and can be used for mechanical systems and storage. The foundation level of a building can also house mechanical systems and be used for storage. Subterranean space is any area below ground level and a bottom floor can refer to the lowest level of a building. With so many synonyms for basements, it's clear that this space offers endless possibilities.