What's the difference between casemate and casemated?

Casemate

Definition:

• (n.) A bombproof chamber, usually of masonry, in which cannon may be placed, to be fired through embrasures; or one capable of being used as a magazine, or for quartering troops.
• (n.) A hollow molding, chiefly in cornices.

Example Sentences:

• (1) Things are going to get tough,” said Edward Macquisten of the Gibraltar chamber of commerce, in his office above the main Casemates Square.

Casemated

Definition:

• (a.) Furnished with, protected by, or built like, a casemate.

Example Sentences:

• (1) Things are going to get tough,” said Edward Macquisten of the Gibraltar chamber of commerce, in his office above the main Casemates Square.