88 entries under firm topic. ×

1
bullheaded(tough, determined, unreasonable, grim)
1
cantankerous(tough, unreasonable, grim, inflexible)
1
complete(certain, obedient, wholehearted, unthinking)
1
constructive(complete, certain, obedient, wholehearted)
1
contained(complete, certain, obedient, wholehearted)
1
contumacious(tough, unreasonable, grim, inflexible)
1
courageous(determined, bold, resolute, confident)
1
cussed(tough, unreasonable, grim, inflexible)
1
enduring(adjective, clear, strong, solid)
1
entire(complete, certain, obedient, wholehearted)
1
full(complete, certain, obedient, wholehearted)
1
headstrong(adjective, tough, unreasonable, grim)
1
implacable(adjective, mean, hard, tough)
1
implicative(complete, certain, obedient, wholehearted)
1
implied(complete, certain, obedient, wholehearted)
1
inarticulate(complete, certain, obedient, wholehearted)
1
inevitable(complete, certain, obedient, wholehearted)
1
inferential(complete, certain, obedient, wholehearted)
1
inferred(adjective, complete, certain, obedient)
1
insubordinate(tough, unreasonable, grim, inflexible)
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APASmart Define. (2015). unshakable thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unshakable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unshakable thesaurus" https://smartdefine.org/unshakable/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unshakable thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unshakable/thesaurus/synonyms>.
MLASmart Define. "unshakable thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/unshakable/thesaurus/synonyms>