137 entries under tough topic. ×
| obdurate(adjective, firm, difficult, determined) | |
| tenacious(adjective, firm, difficult, wild) | |
| adamant(adjective, firm, determined, unreasonable) | |
| determined(adjective, firm, persistent, impulsive) | |
| difficult(adjective, wild, awkward, obstinate) | |
| pertinacious(adjective, firm, difficult, determined) | |
| willful(adjective, firm, fast, awkward) | |
| pigheaded(adjective, firm, difficult, determined) | |
| uncompliant(adjective, firm, stubborn, disobedience) | |
| wild(adjective, control, order, difficult) | |
| dogged(adjective, firm, determined, unreasonable) | |
| immovable(adjective, firm, difficult, determined) | |
| incompliant(adjective, hard, firm, difficult) | |
| indocile(adjective, control, order, difficult) | |
| resolute(adjective, firm, difficult, obstinate) | |
| uncompromising(adjective, firm, difficult, violent) | |
| balky(firm, negative, hostile, obstinate) | |
| cantankerous(adjective, firm, difficult, wild) | |
| intransigent(adjective, firm, determined, stubborn) | |
| unbending(adjective, hard, rough, firm) |
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| APA | Smart Define. (2015). refractory thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/refractory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "refractory thesaurus" https://smartdefine.org/refractory/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, refractory thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/refractory/thesaurus/synonyms>. |
| MLA | Smart Define. "refractory thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/refractory/thesaurus/synonyms> |