- Definitions|2
- Thesaurus|1.4k
- Abbreviations|0
304 entries under adjective topic. ×
| do or die(expression, idiom, tough, firm) | |
| dug in(expression, tough, firm, distant) | |
| factious | |
| formal(strong, tough, firm, cold) | |
| hang tough(expression, sharp, difficult, practical) | |
| hard-and-fast(set, hard, stiff, rigid) | |
| hard-shelled(persistent, obstinate, insistent, dogged) | |
| hard as nails(expression, idiom, tough, firm) | |
| hardheaded(strong, tough, firm, cold) | |
| hell-bent(persistent, obstinate, insistent, dogged) | |
| hold the fort(expression, idiom, tough, firm) | |
| hold the line(expression, idiom, tough, firm) | |
| ill-behaved | |
| impenetrable | |
| insurgent(persistent, obstinate, insistent, dogged) | |
| invariable | |
| invincible(persistent, obstinate, insistent, dogged) | |
| invulnerable | |
| knotty(difficulty, problematic) | |
| labored(strong, hard, tough, severe) |
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| APA | Smart Define. (2015). intractable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/intractable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "intractable thesaurus" https://smartdefine.org/intractable/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, intractable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/intractable/thesaurus/synonyms>. |
| MLA | Smart Define. "intractable thesaurus" 24 June 2015. Web. 24 September 2026. <https://smartdefine.org/intractable/thesaurus/synonyms> |