| research and development(noun, expression, idiom, study, measure) |
| analysis(noun, study, measure, struggle, examination) |
| assay(noun, study, measure, struggle, examination) |
| attempt(noun, study, measure, struggle, examination) |
| check(noun, study, measure, struggle, examination) |
| dry run(noun, expression, study, measure, struggle) |
| essay(noun, study, measure, struggle, examination) |
| examination(noun, study, measure, struggle, test) |
| experiment(noun, study, struggle, examination, test) |
| experimentation(noun, study, measure, struggle, examination) |
| fling(noun, study, measure, struggle, examination) |
| investigation(noun, study, measure, struggle, examination) |
| probe(study, test, trial, research, investigation) |
| proof(noun, study, measure, struggle, examination) |
| research(noun, study, examination, test, trial) |
| test(noun, study, measure, struggle, examination) |
| trial(noun, study, measure, examination, test) |
| trial and error(noun, expression, idiom, study, measure) |
| trial run(noun, expression, study, measure, struggle) |
| try(noun, study, measure, struggle, examination) |