The state or quality of being able to be cured or healed; another word for curability.
From curable (able to be cured) plus -ness forming abstract nouns. This somewhat redundant term with curability reflects the English tendency to create multiple versions of the same concept.
English speakers love suffix variety—we can say curability, curableness, or curability to mean the same thing! Old texts use curableness more often, showing how word preferences shift over centuries as language tidies itself up.
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