| bone of contention(expression, idiom, discord) |
| catechism(noun, study, check, review, request) |
| catechizing(noun, review, investigation, into, autopsy) |
| consideration(noun, study, check, class, exercise) |
| experiment(noun, study, check, review, approval) |
| experimentation(noun, study, investigation) |
| hunt(noun, search, examination, chase, mission) |
| inquire |
| legwork(noun, study, check, review, examination) |
| moot point(expression, idiom, idea) |
| problem |
| question at issue(expression, idiom, discord) |
| test(noun, study, check, review, exercise) |
| trial balloon(noun, expression, review, investigation, into) |
| appeal(noun, order, interest, use, call) |
| application(noun, form, study, order, call) |
| appraisal(noun, order, view, determination, conclusion) |
| ask |
| bid(noun, order, interest, use, call) |
| close inquiry(expression, idiom) |