| unmanageable(tough, difficult, wild, awkward, obstinate) | |
| unmitigable | |
| unmitigated(persistent, continuous, lasting, continuing, remaining) | |
| unpliable(tough, difficult, wild, awkward, obstinate) | |
| unrelievable | |
| unruly(tough, difficult, wild, awkward, obstinate) | |
| unsalvable | |
| unsalvageable | |
| unvarying | |
| unwell(adjective, mean, weak, ill, sick) | |
| unyielding(tough, difficult, persistent, obstinate, stubborn) | |
| usual(persistent, continuous, hardened, lasting, continuing) | |
| wayward(tough, difficult, wild, awkward, obstinate) | |
| weak(mean, disease, down, ill, sick) | |
| willful(tough, difficult, awkward, obstinate, stubborn) | |
| wobbly(mean, weak, down, ill, sick) | |
| absolute | |
| acute | |
| advanced | |
| asymptomatic |
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| APA | Smart Define. (2015). incurable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/incurable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "incurable thesaurus" https://smartdefine.org/incurable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, incurable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/incurable/thesaurus/synonyms>. |
| MLA | Smart Define. "incurable thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/incurable/thesaurus/synonyms> |