| set eyes on(verb, expression, idiom, examine, discover) |
| shadow(verb, examine, case, discover, watch) |
| sleuth(verb, examine, case, discover, watch) |
| spot(verb, examine, discover, watch, scrutinize) |
| stag(verb, examine, case, discover, watch) |
| stake out(verb, expression, examine, case, discover) |
| tail(verb, examine, case, discover, watch) |
| take in(verb, expression, examine, discover, watch) |
| take note(verb, expression, examine, case, discover) |
| trail(verb, examine, case, discover, watch) |
| view(verb, examine, discover, watch, scrutinize) |
| watch(verb, examine, discover, scrutinize, spy) |
| worm in(verb, expression, phrasal verb, business, stir) |
| work undercover(verb, expression, discover, snoop) |