4
resolved
4
sound(adjective, strong, hard, secure, continue)
4
tough(adjective, mean, strong, hard, firm)
4
undeviating
3
changeless(adjective, clear, certain, definite, unquestionable)
3
hard(adjective, mean, strong, tough, harsh)
3
immobile(adjective, strong, secure, steady, substantial)
3
immutable
3
imperturbable
3
incontrovertible(adjective, clear, certain, definite, unquestionable)
3
regular
3
resistant(adjective, determined, resolute, obstinate, uncompromising)
3
trusty
3
unchanging(adjective, clear, firm, solid, certain)
3
unquestioning(adjective, clear, certain, definite, obedient)
3
unvarying(adjective, clear, certain, definite, unquestionable)
3
work well under pressure
2
assured(adjective, certain, bold, confident, unquestionable)
2
balky(tough, firm, unreasonable, grim, inflexible)
2
bold(adjective, firm, determined, resolute, confident)
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APASmart Define. (2015). unshakable thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unshakable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unshakable thesaurus" https://smartdefine.org/unshakable/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, unshakable thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unshakable/thesaurus/synonyms>.
MLASmart Define. "unshakable thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/unshakable/thesaurus/synonyms>