1) Ambiversion 2) Camaraderie 3) Chumminess 4) Companionability 5) Companionableness 6) Comradeliness 7) Comradery 8) Comradeship 9) Conviviality 10) Courteousness 11) Extraversion 12) Extroversion 13) Friendliness 14) Gregariousness 15) Openness 16) Sociableness 17) Sociality 1) Companionability 2) Conviviality 3) Extroversion 4) Sociableness 5) Sociality 6) Unreservedness 
• (n.) The quality of being sociable; sociableness.
So`cia·bil'i·ty noun [ Confer French sociabilité .] The quality of being sociable; sociableness. 
[n] - the relative tendency or disposition to be sociable or associate with one`s fellows
sociability 1. The distribution of individuals of a species within a natural community relative to others of the species. 2. A ranking index which ranges from isolation to aggregation. 3. The characteristic in adult humans to seek the company of other people and to engage in amicable exchange with them, or the disposition in human infants and in ...
sociableness noun the relative tendency or disposition to be sociable or associate with one`s fellows