| stake out(verb, expression, study, consider, examine) |
| verify(verb, check, examine, try, confirm) |
| action(investigate, research, probe, burrow) |
| ask(search, investigate, penetrate, research) |
| be all ears(verb, study, consider, examine, review) |
| bug(verb, study, consider, examine, review) |
| catechize(investigate, ask, explore, research) |
| dredge(action, investigate, research, probe) |
| excavate(action, investigate, research, probe) |
| eye(investigate, penetrate, explore, research) |
| eyeball(verb, study, consider, examine, review) |
| feel around(expression, investigate, penetrate, research) |
| ferret out(expression, action, probe, burrow) |
| frisk(verb, study, consider, examine, review) |
| go after(verb, expression, search, mine) |
| gouge out(expression, action, probe, burrow) |
| jump into(expression, action, probe, burrow) |
| leave no stone unturned(verb, expression, idiom, action, sound) |
| listen in(verb, expression, study, consider, examine) |
| penetrate(investigate, explore, research, poke) |