glide
slide
rub
scratch
shave
graze
scrape
grind
rasp
grate
dust
clay
silt
sand
grit
dirt
gravel
pebbles
cobbles
boulders
glide
slide
rub
scratch
shave
graze
scrape
grind
rasp
grate
dust
clay
silt
sand
grit
dirt
gravel
pebbles
cobbles
boulders