Synonyms of the word

impregnability

• n. The quality or state of being impregnable; invincibility.

invulnerability

• n. The state of being invulnerable.

safety

• n. The condition or feeling of being safe; security; certainty.
• n. (mechanics) A mechanism on a weapon or dangerous equipment designed to prevent accidental firing.
• n. (American football) An instance of a player being sacked or tackled in the end zone, or steps out of the…
• n. (American football) Any of the defensive players who are in position furthest from the line of scrimmage…
• n. Preservation from escape; close custody.
• n. (dated) A safety bicycle.
• v. (transitive) To secure (a mechanical component, as in aviation) to keep it from becoming detached even…