Synonyms|139Antonyms|21|Broader|2Narrower|0Related|93
6
unshakable
5
watertight
5
armored(adjective, defense, strengthened)
4
all-conquering
4
foolproof
4
unassailable
3
invincible(adjective, indestructible)
3
inviolable(adjective, solid, dense, impassable, indestructible)
2
armoured
2
hermetic
2
impenetrable(adjective, dense)
2
impervious
2
tight
2
unstoppable
1
airtight
1
ballproof
1
bullet-proof
1
fireproof
1
flameproof
1
invulnerable(adjective, invincible)
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APASmart Define. (2015). bulletproof thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/bulletproof/thesaurus/synonyms
ChicagoSmart Define. 2015. "bulletproof thesaurus" https://smartdefine.org/bulletproof/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, bulletproof thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/bulletproof/thesaurus/synonyms>.
MLASmart Define. "bulletproof thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/bulletproof/thesaurus/synonyms>