WordNet sense 1 (a small number (of something) dispersed haphazardly):

sprinkling

WordNet sense 2 (a light shower that falls in some locations and not others nearby):

sprinkle

WordNet sense 3 (spreading widely or driving off):

dispersion

WordNet sense 4 (spreading by diffusion):

diffusive, diffusing, dispersive, disseminating, disseminative, spreading

WordNet sense 5 (serving to distribute or allot or disperse):

distributive

WordNet sense 6 (the act of scattering):

scatter, strewing