| develop(verb, study, improve, prepare, practice) |
| discipline(noun, verb, study, work, develop) |
| experiment(noun, verb, go, work, check) |
| habituate(verb, study, work, develop, improve) |
| hone(verb, break, study, work, develop) |
| improve(verb, study, develop, prepare, practice) |
| inure(verb, study, develop, improve, prepare) |
| labor(noun, verb, break, study, work) |
| operation |
| prepare(verb, study, work, develop, improve) |
| rehearse(verb, break, study, work, develop) |
| run through(noun, expression, study, work, develop) |
| shakedown(noun, practice, struggle, discipline, exercise) |
| study(noun, verb, organization, work, increase) |
| teach(verb, study, develop, improve, prepare) |
| test(noun, verb, study, work, check) |
| test flight |
| train(verb, study, work, develop, improve) |
| tune up(verb, expression, study, work, develop) |
| walk through(verb, expression, phrasal verb, study, work) |