| delve(verb, action, investigate, immobilize) |
| action(verb, investigate, immobilize, research) |
| dredge(verb, action, investigate, probe) |
| examine(verb, action, investigate, probe) |
| excavate(verb, action, investigate, probe) |
| ferret out(verb, expression, action, burrow) |
| go into(verb, expression, action, burrow) |
| gouge out(verb, expression, phrasal verb, action, investigate) |
| inquire(verb, action, investigate, research) |
| investigate(verb, action, research, probe) |
| leave no stone unturned(verb, expression, idiom, action, investigate) |
| look into(verb, expression, action, burrow) |
| probe(verb, action, investigate, research) |
| prospect(verb, action, investigate, probe) |
| ransack(verb, action, investigate, probe) |
| really get into(verb, expression, idiom, phrasal verb, action) |
| research(verb, action, investigate, probe) |
| rummage(verb, action, investigate, probe) |
| scoop out(verb, expression, phrasal verb, action, investigate) |
| seek(verb, action, investigate, probe) |