89 entries under tough topic. ×

7
opinionated(adjective, firm, determined, resolute)
6
adamant(adjective, strong, hard, determined)
6
inexorable(adjective, strong, hard, determined)
6
relentless(adjective, strong, hard, cold)
6
unbending(adjective, strong, hard, determined)
5
immovable(adjective, strong, hard, determined)
5
intractable(adjective, strong, firm, cold)
5
perverse(adjective, firm, resist, determined)
4
balky(firm, unreasonable, grim, inflexible)
4
determined(adjective, firm, resolute, obstinate)
4
hard-boiled(adjective, strong, hard, sound)
3
firm(adjective, strong, hard, determined)
3
grim(adjective, strong, hard, determined)
3
implacable(adjective, strong, hard, firm)
2
fixed(firm, determined, resolute, obstinate)
2
harsh(adjective, strong, hard, severe)
2
persevering(firm, determined, unreasonable, grim)
2
severe(adjective, strong, hard, harsh)
2
steadfast(firm, determined, resolute, obstinate)
2
unshakable(firm, determined, resolute, obstinate)
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APASmart Define. (2015). hardheaded thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/hardheaded/thesaurus/synonyms
ChicagoSmart Define. 2015. "hardheaded thesaurus" https://smartdefine.org/hardheaded/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, hardheaded thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hardheaded/thesaurus/synonyms>.
MLASmart Define. "hardheaded thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/hardheaded/thesaurus/synonyms>