20 entries under hard topic. ×

15
rigid(adjective, determined, resolute, obstinate)
13
determined(verb, adjective, firm, resolute)
9
immovable(adjective, determined, resolute, obstinate)
8
adamant(adjective, determined, resolute, obstinate)
2
uncompliant(adjective, set, stiff, resolute)
1
adamantine(adjective, resolute, rigid, inflexible)
1
dogged(verb, adjective, set, stiff)
1
dyed-in-the-wool(resolute, rigid, inflexible, strict)
1
hard-and-fast(adjective, set, stiff, rigid)
1
immutable(adjective, set, stiff, rigid)
1
implacable(adjective, firm, determined, resolute)
1
indomitable(adjective, resolute, rigid, inflexible)
1
iron(adjective, set, stiff, rigid)
1
rigorous(adjective, resolute, rigid, inflexible)
1
steely(adjective, set, stiff, rigid)
1
strict(tough, fixed, rigid, reserved)
1
stringent(adjective, set, stiff, rigid)
1
unadaptable(adjective, set, stiff, rigid)
1
unchangeable(adjective, set, stiff, rigid)
0
staunch(adjective, set, stiff, resolute)
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APASmart Define. (2015). unswayable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unswayable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unswayable thesaurus" https://smartdefine.org/unswayable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unswayable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unswayable/thesaurus/synonyms>.
MLASmart Define. "unswayable thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unswayable/thesaurus/synonyms>