insensitiveness vs insensitivity

insensitiveness and insensitivity both are nouns.

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

As nouns, insensitiveness and insensitivity are synonyms defined as:

insensitiveness and insensitivity: the inability to respond to affective changes in your interpersonal environment

insensitiveness (noun)	insensitivity (noun)
the inability to respond to affective changes in your interpersonal environment	the inability to respond to affective changes in your interpersonal environment