Synonyms for Grainy (same or very similar meaning)
WordNet sense 1 (composed of or covered with particles resembling meal in texture or consistency):
farinaceous, granular, gritty, mealy, coarse-grained, granuloseWordNet sense 2 (of textures that are rough to the touch or substances consisting of relatively large particles):
coarse, harshFrom the ODE community, based on WordNetadd/edit