Synonyms of the word

stronghold

• n. A fortress.
• n. A place of refuge, survival or domination by a particular group or idea.

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.

fastness

• n. A secure or fortified place; a stronghold, a fortress.
• n. The state of being fast.
• n. The ability of a dye to withstand fading.