1
sitting pretty(expression, adjective, secure, safe, snug)
1
snug(adjective, secure, safe, intact, guarded)
1
stodgy
1
supreme(adjective, certain)
1
tenable
1
tended(adjective, secure, safe, snug, intact)
1
true(adjective, certain)
1
trustworthy(adjective, certain)
1
unalterable
1
unambiguous(adjective, certain)
1
unapproachable
1
unarguable
1
unasked
1
unattainable
1
unbendable
1
unchallengeable
1
undamaged(adjective, secure, safe, snug, intact)
1
under lock and key(expression, idiom, secure, safe, snug)
1
unequivocal(adjective, certain)
1
unharmed(adjective, secure, safe, snug, intact)
11 years ago|6.1k views|share |citing 
APASmart Define. (2015). unassailable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unassailable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unassailable thesaurus" https://smartdefine.org/unassailable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unassailable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unassailable/thesaurus/synonyms>.
MLASmart Define. "unassailable thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unassailable/thesaurus/synonyms>