137 entries under tough topic. ×
| bullheaded(adjective, firm, difficult, determined) | |
| inexorable(adjective, firm, persistent, obstinate) | |
| opinionated(adjective, firm, unreasonable, grim) | |
| stiff-necked(adjective, firm, deliberate, determined) | |
| sturdy(adjective, hard, solid, rigid) | |
| untoward(adjective, adverb, control, order) | |
| demanding(adjective, persistent, obstinate, problematic) | |
| fixed(adjective, hard, rough, firm) | |
| problem(adjective, problematic, trying) | |
| relentless(firm, persistent, obstinate, stubborn) | |
| set(adjective, hard, firm, solid) | |
| single-minded(adjective, firm, persistent, obstinate) | |
| unaccommodating(adjective, grim, demanding, problematic) | |
| argumentative(adjective, grim, problematic, trying) | |
| awkward(difficulty, difficult, unpleasant, wild) | |
| cussed(firm, persistent, obstinate, stubborn) | |
| exacting(adjective, persistent, obstinate, problematic) | |
| irritable(adjective, grim, restless, obstinate) | |
| ornery(firm, cross, negative, hostile) | |
| rude(adjective, grim, problematic, trying) |
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| APA | Smart Define. (2015). refractory thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/refractory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "refractory thesaurus" https://smartdefine.org/refractory/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, refractory thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/refractory/thesaurus/synonyms>. |
| MLA | Smart Define. "refractory thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/refractory/thesaurus/synonyms> |