- coffer, caisson, lacuna - an ornamental sunken panel in a ceiling or dome
--1 is a kind of panel
- caisson - a two-wheeled military vehicle carrying artillery ammunition
--2 is a kind of military vehicle
- caisson, ammunition chest - a chest to hold ammunition
--3 is a kind of chest
- caisson, pneumatic caisson, cofferdam - large watertight chamber used for construction under water
--4 is a kind of chamber
- caisson, ammunition chest - a chest to hold ammunition