1
mighty
1
nonperishable
1
okay(adjective, secure, safe, snug, intact)
1
out of danger(expression, idiom, secure, safe, snug)
1
overpowering
1
overwhelming
1
patented
1
policed
1
preserved(adjective, secure, perfect, safe, snug)
1
proof against(verb, expression, phrasal verb, safety)
1
quenchless
1
reliable
1
resistive(adjective, resistant)
1
resistless
1
rigid(adjective, unyielding, unbending, unreceptive)
1
riskless
1
sacred(adjective, protected)
1
safe and sound(expression, idiom, secure, safe, snug)
1
screened
1
shellproof
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APASmart Define. (2015). invulnerable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/invulnerable/thesaurus/synonyms
ChicagoSmart Define. 2015. "invulnerable thesaurus" https://smartdefine.org/invulnerable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, invulnerable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/invulnerable/thesaurus/synonyms>.
MLASmart Define. "invulnerable thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/invulnerable/thesaurus/synonyms>