What is another word for pneumatic caisson?
Pronunciation: [njuːmˈatɪk kˈe͡ɪsən] (IPA) 
The term "pneumatic caisson" refers to a structure used in civil engineering for constructing strong foundations for large structures. It consists of a hollow cylindrical chamber that is filled with compressed air, which allows for excavation and construction work to take place in a dry, watertight environment below the water table. Some synonyms for the term "pneumatic caisson" include "compressed air chamber," "underwater excavation vessel," "watertight structure," and "subaqueous construction equipment." Other related terms include "underwater tunneling machine" and "submersible drilling rig." Regardless of the terminology used, such equipment plays a crucial role in constructing buildings, bridges, and other large-scale infrastructure projects that require solid foundations.
