unsociableness vs temperament

unsociableness and temperament both are nouns.

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

As nouns, temperament is a hypernym of unsociableness; that is, temperament is a word with a broader meaning than unsociableness:

unsociableness: an unsociable disposition; avoiding friendship or companionship
temperament: your usual mood

Other hypernyms of unsociableness include disposition.

unsociableness (noun)	temperament (noun)
an unsociable disposition; avoiding friendship or companionship	an adjustment of the intervals (as in tuning a keyboard instrument) so that the scale can be used to play in different keys
	your usual mood
	excessive emotionalism or irritability and excitability (especially when displayed openly)