Any process that activates or increases the frequency, rate or extent of natural killer cell degranulation.
Synonyms:
exact_synonym:
positive regulation of NK cell degranulation; positive regulation of NK cell granule exocytosis; positive regulation of natural killer cell granule exocytosis; up regulation of natural killer cell degranulation; upregulation of natural killer cell degranulation
narrow_synonym:
activation of natural killer cell degranulation; stimulation of natural killer cell degranulation