caisson

• It's called a caisson, which is a huge, watertight wooden box half the size of a city block.
• Instead of a caisson, a hearse brought Hernandez's casket to the gravesite. —  Air Force Times - News
• The sand, some 14 feet in depth, which originally surrounded the building, has been washed away, allowing the sea free access to the foundation caisson, which is down 14 feet into the solid madrepore. —  Report on the Department of Ports and Harbours for the Year 1890-91
• The explosion of a particular caisson, the shriek of a special shell, will ring in one's ears for life. —  The Creed of the Old South 1865-1915
• "Would to God I knew how to spare his He found Bradley lunching on a gun caisson, and delivered his orders. —  The Brigade Commander

Allen's Synonyms and Antonyms

Used in the Same Context