aloofness vs unsociability

aloofness and unsociability both are nouns.

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

As nouns, unsociability is a hypernym of aloofness; that is, unsociability is a word with a broader meaning than aloofness:

aloofness: a disposition to be distant and unsympathetic in manner
unsociability: an unsociable disposition; avoiding friendship or companionship

Other hypernyms of aloofness include unsociableness.

aloofness (noun)	unsociability (noun)
a disposition to be distant and unsympathetic in manner	an unsociable disposition; avoiding friendship or companionship
indifference by personal withdrawal