Synonyms of unassailable

Adjective

1. impregnable, inviolable, secure, strong, unassailable, unattackable, invulnerable (vs. vulnerable)

usage: immune to attack; incapable of being tampered with; "an impregnable fortress"; "fortifications that made the frontier inviolable"; "a secure telephone connection"

2. unassailable, untouchable, inviolable (vs. violable)

usage: impossible to assail

3. unassailable, unshakable, watertight, bulletproof, incontestable (vs. contestable), incontestible

usage: without flaws or loopholes; "an ironclad contract"; "a watertight alibi"; "a bulletproof argument"

Definition and meaning of unassailable (Dictionary)