unsociability vs unsociableness

unsociability and unsociableness both are nouns.

Word	Noun	Adjective	Verb	Adverb
unsociability	Yes	No	No	No
unsociableness	Yes	No	No	No

As nouns, unsociability and unsociableness are synonyms defined as:

unsociability and unsociableness: an unsociable disposition; avoiding friendship or companionship

unsociability (noun)	unsociableness (noun)
an unsociable disposition; avoiding friendship or companionship	an unsociable disposition; avoiding friendship or companionship