callosity vs insensitiveness

callosity and insensitiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
callosity	Yes	No	No	No
insensitiveness	Yes	No	No	No

As nouns, insensitiveness is a hypernym of callosity; that is, insensitiveness is a word with a broader meaning than callosity:

callosity: devoid of passion or feeling; hardheartedness
insensitiveness: the inability to respond to affective changes in your interpersonal environment

Other hypernyms of callosity include insensitivity.

callosity (noun)	insensitiveness (noun)
devoid of passion or feeling; hardheartedness	the inability to respond to affective changes in your interpersonal environment
an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)