- Definitions|2
- Thesaurus|1.3k
- Abbreviations|0
108 entries under stubborn topic. ×
| unalterable(adjective, close, set, hard, severe) | |
| unmanageable(tough, firm, persistent, obstinate) | |
| willful(adjective, tough, firm, determined, resolute) | |
| balky(tough, firm, unreasonable, grim, inflexible) | |
| bullhead(adjective, mean, hard, tough, harsh) | |
| cold fish(expression, adjective, mean, hard) | |
| dyed-in-the-wool(adjective, set, strong, hard, tough) | |
| fast(adjective, strong, tough, firm, intense) | |
| hard-boiled(adjective, mean, strong, hard, tough) | |
| ornery(tough, firm, unreasonable, grim, inflexible) | |
| rebellious(tough, firm, unreasonable, grim, inflexible) | |
| strong(adjective, hard, tough, severe, firm) | |
| sturdy(adjective, strong, hard, tough, firm) | |
| thick-skinned(adjective, mean, hard, tough, harsh) | |
| tough nut to crack(expression, adjective, idiom, mean, hard) | |
| unchanging(adjective, close, severe, firm, harsh) | |
| unimpressible(adjective, mean, hard, tough, harsh) | |
| unreasonable(tough, firm, grim, inflexible, obstinate) | |
| untoward(tough, firm, unreasonable, grim, inflexible) | |
| contradictory(determined, fixed) |
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| APA | Smart Define. (2015). relentless thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/relentless/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "relentless thesaurus" https://smartdefine.org/relentless/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, relentless thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/relentless/thesaurus/synonyms>. |
| MLA | Smart Define. "relentless thesaurus" 24 June 2015. Web. 29 September 2026. <https://smartdefine.org/relentless/thesaurus/synonyms> |