164 entries under adjective topic. ×

3
grim(strong, hard, tough, determined)
3
hardened(determined, resolute, uncompromising, unshakeable)
3
implacable(strong, hard, tough, firm)
3
objective(hard, sound, excite, rational)
3
pig-headed(determined, resolute, obstinate, uncompromising)
3
prosaic(hard, sound, excite, rational)
3
shrewd(hard, sound, sharp, practical)
2
harsh(strong, hard, tough, severe)
2
inconvincible(determined, resolute, uncompromising, unshakeable)
2
insistent(determined, resolute, obstinate, uncompromising)
2
ossified(determined, resolute, uncompromising, unshakeable)
2
reasonable(hard, sound, sensible, practical)
2
sane(hard, sound, reasonable, sensible)
2
self-opinionated(determined, resolute, uncompromising, unshakeable)
2
severe(strong, hard, tough, harsh)
2
solid(firm, inflexible, obstinate, stubborn)
2
unidealistic(hard, sound, reasonable, sensible)
2
unwavering(determined, resolute, obstinate, uncompromising)
1
astringent(strong, hard, tough, severe)
1
austere(strong, hard, tough, severe)
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APASmart Define. (2015). hardheaded thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/hardheaded/thesaurus/synonyms
ChicagoSmart Define. 2015. "hardheaded thesaurus" https://smartdefine.org/hardheaded/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, hardheaded thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/hardheaded/thesaurus/synonyms>.
MLASmart Define. "hardheaded thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/hardheaded/thesaurus/synonyms>