- Definitions|2
- Thesaurus|1.3k
- Abbreviations|0
178 entries under tough topic. ×
| unsympathetic(adjective, mean, hard, cool) | |
| heartless(adjective, mean, feeling, hard, cool) | |
| steely(adjective, strong, hard, cold) | |
| flinty(adjective, close, strong, hard) | |
| opinionated(adjective, firm, determined, resolute) | |
| persistent(adjective, strong, flat, firm) | |
| rigorous(adjective, strong, hard, severe) | |
| austere(adjective, mean, strong, hard) | |
| cold-blooded(adjective, person, mean, hard, cool) | |
| hardheaded(adjective, strong, hard, determined) | |
| merciless(adjective, person, mean, hard) | |
| pitiless(adjective, mean, hard, severe) | |
| refractory(adjective, firm, difficult, determined) | |
| strict(adjective, strong, hard, severe) | |
| uncompassionate(adjective, person, mean, hard, cool) | |
| cold(adjective, mean, hard, cool) | |
| cruel(adjective, mean, strong, hard, cool) | |
| dour(adjective, close, hard, severe) | |
| ruthless(adjective, mean, hard, severe) | |
| bullheaded(adjective, strong, hard, deliberate) |
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| APA | Smart Define. (2016). obdurate thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/obdurate/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "obdurate thesaurus" https://smartdefine.org/obdurate/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2016, obdurate thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/obdurate/thesaurus/synonyms>. |
| MLA | Smart Define. "obdurate thesaurus" 23 March 2016. Web. 29 September 2026. <https://smartdefine.org/obdurate/thesaurus/synonyms> |