callousness vs insensibility

callousness and insensibility both are nouns.

Word	Noun	Adjective	Verb	Adverb
callousness	Yes	No	No	No
insensibility	Yes	No	No	No

As nouns, callousness and insensibility are synonyms defined as:

callousness and insensibility: devoid of passion or feeling; hardheartedness

Other synonyms of callousness include callosity, hardness, unfeelingness.

callousness (noun)	insensibility (noun)
devoid of passion or feeling; hardheartedness	devoid of passion or feeling; hardheartedness
	a lack of sensibility