Consortion :: Consortion (n.) Fellowship; association; companionship.
Sortie :: Sortie (n.) The sudden issuing of a body of troops, usually small, from a besieged place to attack or harass the besiegers; a sally..
Sortilege :: Sortilege (n.) The act or practice of drawing lots; divination by drawing lots.
Sortition :: Sortition (n.) Selection or appointment by lot.