- Definitions|1
- Thesaurus|229
- Abbreviations|0
| stiff-necked(adjective, persistent, constant, pitiless, unyielding) | |
| tenacious(adjective, persistent, constant, pitiless, unyielding) | |
| tough-minded | |
| unromantic | |
| unsentimental | |
| balking | |
| balky | |
| bigoted | |
| bound(adjective, persistent, constant, pitiless, unyielding) | |
| bound and determined(expression, adjective, idiom, persistent, constant) | |
| bulldogged | |
| bulletheaded | |
| bullheaded | |
| business-like | |
| case-hardened | |
| ceaseless(adjective, persistent, constant, pitiless, unyielding) | |
| constant(adjective, persistent, pitiless, unyielding, endless) | |
| continual(adjective, persistent, constant, pitiless, unyielding) | |
| continuous(adjective, persistent, constant, pitiless, unyielding) | |
| dogged |
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| APA | Smart Define. (2015). hard-headed thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/hard-headed/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hard-headed thesaurus" https://smartdefine.org/hard-headed/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, hard-headed thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/hard-headed/thesaurus/synonyms>. |
| MLA | Smart Define. "hard-headed thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/hard-headed/thesaurus/synonyms> |