Synonyms|289Antonyms|101|Broader|6Narrower|0Related|320

37 entries under locked topic. ×

1
set(adjective, firm, true, fixed, constant)
1
sheltered(adjective, secure, safe, snug, intact)
1
staunch(adjective, strong, firm, true, fixed)
1
sure(adjective, firm, true, fixed, resolute)
1
tenacious(adjective, firm, true, fixed, constant)
1
undamaged(adjective, secure, safe, snug, intact)
1
unharmed(adjective, secure, safe, snug, intact)
0
adjusted(adjective, safe, sheltered, protected)
0
anchored(adjective, safe, sheltered, protected)
0
bound(adjective, safe, sheltered, protected)
0
buttoned down(expression, adjective, safe, sheltered, protected)
0
fastened(adjective, firm, true, fixed, constant)
0
iron(adjective, safe, sheltered, protected)
0
nailed(adjective, safe, sheltered, protected)
0
riskless(adjective, safe, sheltered, protected)
0
safe as houses(expression, adjective, idiom, safe, sheltered)
0
solid as a rock(expression, adjective, idiom, safe, sheltered)
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ChicagoSmart Define. 2015. "impregnable thesaurus" https://smartdefine.org/impregnable/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, impregnable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/impregnable/thesaurus/synonyms>.
MLASmart Define. "impregnable thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/impregnable/thesaurus/synonyms>