Synonyms of the word

fortress

• n. A fortified place; a large and permanent fortification, sometimes including a town; a fort; a castle;…
• n. (chess) A position that, if obtained by the weaker side, will prevent penetration by the opposing side,…
• v. To furnish with a fortress or with fortresses; to guard; to fortify.

defence

• n. The action of defending, of protecting from attack, danger or injury.
• n. Something used to oppose attack(s).
• n. An argument in support or justification of something.
• n. (team sports) A strategy and tactics employed to prevent the other team from scoring; contrasted with…
• n. (team sports) The portion of a team dedicated to preventing the other team from scoring; contrasted with…
• n. Government policy or (infra)structure related to the military.
• n. (obsolete) Prohibition; a prohibitory ordinance.
• v. (obsolete, transitive) To furnish with defences; to fortify.

defense

• n. The action of defending or protecting from attack, danger, or injury.
• n. Anything employed to oppose attack(s).
• n. An argument in support or justification of something.
• n. (government, military) Government policy or (infra)structure related to the military.
• n. (obsolete) Prohibition; a prohibitory ordinance.

fort

• n. A fortified defensive structure stationed with troops.
• n. Any permanent army post.
• v. To create a fort, fortifications, a strong point, or a redoubt.