Synonyms|139Antonyms|21|Broader|2Narrower|0Related|93

11 entries under impassable topic. ×

3
inviolable(adjective, solid, dense, indestructible)
1
strong(adjective, protected, strengthened, untouchable)
1
untouchable(adjective, invincible, indestructible)
0
close(adjective, solid, dense, impervious)
0
indestructible(adjective, protected, strengthened, untouchable)
0
indomitable(adjective, untouchable, invincible, indestructible)
0
irresistible(adjective, indestructible)
0
powerful(adjective, untouchable, invincible, indestructible)
0
unattackable(adjective, indestructible)
0
undefeatable(adjective, indestructible)
0
unsurmountable(adjective, indestructible)
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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>