soil erosion

English Thesaurus

1. the washing away of soil by the flow of water (noun.process)

hypernym	:	eating away, eroding, erosion, wearing, wearing away,
definition	:	(geology) the mechanical process of wearing or grinding something down (as by particles washing over it) (noun.process)

hyponym	:	wash, washout,
definition	:	the erosive process of washing away soil or gravel by water (as from a roadway) (noun.process)