| trough(noun, drain, means, dip, channel) |
| cleft(noun, opening, scratch, wound, dip) |
| corrugation(noun, turn, line, gather, bend) |
| dig(noun, verb, support, accept, remove) |
| grind(noun, form, characteristic, rule, practice) |
| path(noun, way, course, microgroove) |
| sulcus(noun, furrow) |
| crease(noun, mark, turn, line, gather) |
| incise |
| canal(noun, line, way, course, means) |
| corrugate(verb, remove, bend, dig, double) |
| mark(noun, verb, cut, score, way) |
| split(noun, verb) |
| track(noun, mark, line, trace, trail) |
| treadmill(noun, informal, usual, grind) |
| chamfer(noun, furrow) |
| chase |
| crack(noun, furrow) |
| crimp(noun, verb, turn, line, arrest) |
| fancy(noun, feeling, desire, weakness, informal) |