Insensibility is a related term of unfeelingness.
As nouns the difference between insensibility and unfeelingness
is that insensibility is the property of being insensible while unfeelingness is the state or condition of being unfeeling.
insensibility
English
Noun
(insensibilities)
The property of being insensible.
unfeelingness
English
Noun
(-)
The state or condition of being unfeeling.