- Definitions|2
- Thesaurus|1.4k
- Abbreviations|0
136 entries under tough topic. ×
| pigheaded(adjective, firm, deliberate, determined) | |
| hard(adjective, sharp, firm, fixed) | |
| intransigent(adjective, firm, difficult, determined) | |
| self-willed(adjective, firm, difficult, determined) | |
| implacable(adjective, hard, firm, cruel) | |
| obstreperous(adjective, control, order, resist) | |
| willful(adjective, firm, difficult, violent) | |
| pertinacious(adjective, strong, firm, difficult) | |
| stiff(adjective, hard, rough, firm) | |
| firm(adjective, persistent, rigid, inflexible) | |
| inexorable(adjective, appearance, firm, violent) | |
| resolute(adjective, appearance, hard, rough) | |
| severe(adjective, persistent, reserved, obstinate) | |
| untoward(adjective, control, order, firm) | |
| cantankerous(adjective, firm, difficult, persistent) | |
| persistent(adjective, firm, determined, obstinate) | |
| relentless(adjective, appearance, strong, firm) | |
| stiff-necked(adjective, firm, stupid, unreasonable) | |
| tenacious(adjective, firm, difficult, persistent) | |
| uncompliant(adjective, firm, unreasonable, irritable) |
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| APA | Smart Define. (2015). intractable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/intractable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "intractable thesaurus" https://smartdefine.org/intractable/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, intractable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/intractable/thesaurus/synonyms>. |
| MLA | Smart Define. "intractable thesaurus" 24 June 2015. Web. 26 September 2026. <https://smartdefine.org/intractable/thesaurus/synonyms> |