42 entries under stubborn topic. ×

6
rigorous(adjective, set, strong, hard, tough)
6
set(adjective, hard, firm, solid, resolute)
5
obstinate(adjective, set, hard, stiff, rigid)
5
unchangeable(adjective, set, hard, stiff, resolute)
4
staunch(adjective, set, hard, stiff, resolute)
3
dogged(adjective, set, hard, stiff, resolute)
3
fixed(adjective, hard, firm, solid, rigid)
3
immutable(adjective, set, hard, stiff, rigid)
3
intractable(adjective, set, hard, stiff, rigid)
3
strict(adjective, set, strong, hard, tough)
3
uncompliant(adjective, determined, resolute, strict, obstinate)
2
indomitable(adjective, set, strong, hard, tough)
1
dyed-in-the-wool(adjective, set, strong, hard, tough)
1
hard-and-fast(adjective, set, hard, stiff, rigid)
1
pigheaded(adjective, obstinate, unbending)
1
single-minded(adjective, set, hard, stiff, rigid)
1
stringent(adjective, set, hard, stiff, rigid)
1
unadaptable(adjective, set, hard, stiff, rigid)
1
unswayable(adjective, set, hard, stiff, rigid)
0
hidebound(obstinate, unbending)
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APASmart Define. (2015). steely thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/steely/thesaurus/synonyms
ChicagoSmart Define. 2015. "steely thesaurus" https://smartdefine.org/steely/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, steely thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/steely/thesaurus/synonyms>.
MLASmart Define. "steely thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/steely/thesaurus/synonyms>