8
immune(adjective, characteristic, protection, defense, susceptible)
6
well-versed(adjective, characteristic, protection, defense)
6
all-conquering(adjective, characteristic, protection, defense)
6
fortified(adjective, characteristic, protection, defense)
6
insusceptible(adjective, characteristic, protection, defense)
5
armored(adjective, characteristic, protection, defense)
5
omnipotent(adjective, characteristic, protection, defense)
5
almighty(adjective, characteristic, protection, defense)
5
resistant(adjective, characteristic, protection, defense)
5
safeguarded(adjective, characteristic, protection, defense)
5
secured(adjective, characteristic, protection, defense)
5
unexposed(adjective, characteristic, protection, defense)
5
warded(adjective, characteristic, protection, defense)
4
defendable(adjective, characteristic, protection, defense)
4
indomitable(adjective, characteristic, protection, defense)
4
insurmountable(adjective, characteristic, protection, defense)
4
impervious(adjective, characteristic, protection, responsive, defense)
3
closed(adjective, characteristic, strong, protection, defense)
3
entrenched(adjective, characteristic, protection, defense)
2
good(adjective, characteristic, protection, defense)
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APASmart Define. (2016). vulnerable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/vulnerable/thesaurus/antonyms
ChicagoSmart Define. 2016. "vulnerable thesaurus" https://smartdefine.org/vulnerable/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, vulnerable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/vulnerable/thesaurus/antonyms>.
MLASmart Define. "vulnerable thesaurus" 11 March 2016. Web. 22 September 2026. <https://smartdefine.org/vulnerable/thesaurus/antonyms>