WordNet sense 1 (agitation resulting from active worry):

lather, stew, sweat, swither, lather

WordNet sense 2 (a spot that has been worn away by abrasion or erosion):

worn spot

WordNet sense 3 (an ornamental pattern consisting of repeated vertical and horizontal lines (often in relief)):

Greek fret, Greek key, key pattern

WordNet sense 4 (become or make sore by or as if by rubbing):

chafe, gall

WordNet sense 5 (worry unnecessarily or excessively):

fuss, niggle

WordNet sense 6 (gnaw into; make resentful or angry):

grate, rankle, eat into

WordNet sense 7 (be too tight; rub or press):

choke, gag

WordNet sense 8 (cause friction):

fray, rub, scratch

WordNet sense 9 (remove soil or rock):

erode, eat away