The quality of affording easy familiarity and sociability; SYN. comaraderie, comradeliness, comradery.

Suitability to be a companion; SYN. companionableness.

The quality of being gregarious--having a dislike of being alone.

ETYM Cf. French sociabilité.
The relative tendency or disposition to be sociable or associate with one's fellows; SYN. sociableness.