| put out a feeler(expression, idiom, investigate, penetrate) |
| put to the test(expression, idiom, study, consider, examine) |
| reconnoiter(verb, study, consider, examine, review) |
| review(noun, verb, study, consider, view) |
| run down(verb, expression, study, consider, examine) |
| scout(verb, study, consider, examine, review) |
| scrutinize(study, consider, examine, question, investigate) |
| sound(investigate, penetrate, explore, research) |
| spy(verb, study, consider, examine, review) |
| tap(verb, study, consider, examine, review) |
| test(investigate, penetrate, explore, research) |
| test the waters(expression, idiom, investigate, penetrate) |
| wiretap(verb, study, consider, examine, review) |
| catechize(investigate, explore, research, delve) |
| query(investigate, explore, research, delve) |
| quiz(investigate, penetrate, explore, research) |
| sound out(expression, investigate, penetrate, research) |