callosity vs callousness

callosity and callousness both are nouns.

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

As nouns, callosity and callousness are synonyms defined as:

callosity and callousness: devoid of passion or feeling; hardheartedness

Other synonyms of callosity include hardness, insensibility, unfeelingness.

callosity (noun)	callousness (noun)
devoid of passion or feeling; hardheartedness	devoid of passion or feeling; hardheartedness
an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)