Synonyms: invulnerable
Definition: immune to attack; impregnable
Usage: gunners raked the beach from invulnerable positions on the cliffs
Similar words: air-tight, airtight
Definition: having no weak points
Usage: an airtight defense; an airtight argument
Similar words: shellproof, bombproof
Definition: able to resist the explosive force of bombs and shells
Usage: bombproof shelter
Similar words: defendable, defensible
Definition: capable of being defended
Similar words: entrenched
Definition: dug in
Similar words: inviolable, impregnable, unassailable, unattackable, strong, secure
Definition: immune to attack; incapable of being tampered with
Usage: an impregnable fortress; fortifications that made the frontier inviolable; a secure telephone connection
Similar words: tight
Definition: set so close together as to be invulnerable to penetration
Usage: in tight formation; a tight blockade
Similar words: sheltered
Definition: protected from danger or bad weather
Usage: a sheltered harbor
Similar words: untouchable
Definition: beyond the reach of criticism or attack or impeachment
Usage: for the first time criticism was directed at a hitherto untouchable target- Newsweek