Synonyms for Dissemination (same or very similar meaning)
WordNet sense 1 (the opening of a subject to widespread discussion and debate):
airing, spreading, public exposureWordNet sense 2 (the property of being diffused or dispersed):
diffusionWordNet sense 3 (the act of dispersing or diffusing something):
dispersal, dispersionFrom the ODE community, based on WordNetadd/edit