164 entries under adjective topic. ×

8
stiff-necked(strong, hard, tough, resist)
8
tenacious(tough, firm, resist, determined)
8
uncompromising(determined, resolute, obstinate, unshakeable)
8
unrelenting(strong, hard, tough, cold)
8
wilful(determined, resolute, obstinate, uncompromising)
7
adamantine(strong, hard, tough, firm)
7
down-to-earth(hard, sound, reasonable, excite)
7
opinionated(tough, firm, determined, resolute)
7
unsentimental(hard, sound, reasonable, sensible)
6
adamant(strong, hard, tough, determined)
6
inexorable(strong, hard, tough, determined)
6
intransigent(determined, resolute, obstinate, uncompromising)
6
pragmatical(hard, sound, excite, real)
6
relentless(strong, hard, tough, cold)
6
sober(hard, sound, reasonable, sharp)
6
unbending(strong, hard, tough, determined)
6
unromantic(hard, sound, excite, real)
5
bigoted(determined, resolute, obstinate, uncompromising)
5
immovable(strong, hard, tough, determined)
5
intractable(strong, tough, firm, cold)
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APASmart Define. (2015). hardheaded thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/hardheaded/thesaurus/synonyms
ChicagoSmart Define. 2015. "hardheaded thesaurus" https://smartdefine.org/hardheaded/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, hardheaded thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/hardheaded/thesaurus/synonyms>.
MLASmart Define. "hardheaded thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/hardheaded/thesaurus/synonyms>