. "Any process that activates or increases the frequency, rate or extent of natural killer cell degranulation." . . . . "positive regulation of natural killer cell degranulation" . "activation of natural killer cell degranulation" . "positive regulation of natural killer cell granule exocytosis" . "positive regulation of NK cell degranulation" . "positive regulation of NK cell granule exocytosis" . "stimulation of natural killer cell degranulation" . "up regulation of natural killer cell degranulation" . "up-regulation of natural killer cell degranulation" . "upregulation of natural killer cell degranulation" . . . . .