Incurableness is a synonym of incurability.
As nouns the difference between incurableness and incurability
is that incurableness is the state or condition of being incurable while incurability is the quality or state of being incurable—not being able to be cured.
incurableness
English
Noun
(-)
the state or condition of being incurable
Synonyms
* incurability
incurability
English
Noun
(-)
The quality or state of being incurable—not being able to be cured.
Synonyms
* incurableness