WordNet sense 1 (the noise of something spattering or sputtering explosively):

splatter, splutter, sputter, spattering, splattering, sputtering

WordNet sense 2 (rain gently):

patter, pitter-patter, spit, sprinkle

WordNet sense 3 (spot, splash, or soil):

bespatter

WordNet sense 4 (dash a liquid upon or against):

plash, splash, swash, splosh

WordNet sense 5 (the act of splashing a (liquid) substance on a surface):

splashing