gregariousness vs sociableness

gregariousness and sociableness both are nouns.

Word	Noun	Adjective	Verb	Adverb
gregariousness	Yes	No	No	No
sociableness	Yes	No	No	No

As nouns, sociableness is a hypernym of gregariousness; that is, sociableness is a word with a broader meaning than gregariousness:

gregariousness: the quality of being gregarious--having a dislike of being alone
sociableness: the relative tendency or disposition to be sociable or associate with one's fellows

Other hypernyms of gregariousness include sociability.

gregariousness (noun)	sociableness (noun)
the quality of being gregarious--having a dislike of being alone	the relative tendency or disposition to be sociable or associate with one's fellows