| sharpen(verb, study, give, work, develop) |
| grind(verb, file, sharpen, whet) |
| whet(verb, give, sharp, file, sharpen) |
| file(verb, sharpen, whet) |
| edge(verb, give, sharp, file, sharpen) |
| perfect(verb, develop, complete, finish, improve) |
| refine(verb, develop, complete, finish, improve) |
| whetstone(noun, sharpness, steel, grindstone) |
| strop(verb, file, sharpness, sharpen, whet) |
| taper(verb, sharpen, whet) |
| grindstone(noun, sharpness, steel, whetstone) |
| emery |
| acuminate(verb, give, sharp, sharpen, whet) |
| drill(verb, study, work, develop, improve) |
| exercise(verb, study, work, develop, improve) |
| improve(verb, study, develop, complete, finish) |
| practice(verb, develop, improve, prepare, review) |
| rehearse(verb, study, work, develop, improve) |
| set(verb, break, develop, improve, prepare) |
| sharpener |