| tab(bug, scrutiny, investigation, monitor, tap) |
| tail(bug, scrutiny, investigation, monitor, tap) |
| tap(bug, scrutiny, investigation, monitor, shadowing) |
| track(bug, scrutiny, investigation, monitor, tap) |
| vigil(bug, scrutiny, investigation, monitor, tap) |
| vigilance(bug, scrutiny, investigation, monitor, tap) |
| watch(bug, scrutiny, investigation, monitor, tap) |
| wiretap(bug, scrutiny, investigation, monitor, tap) |
| fact-finding(watching, voyeurism) |
| fact finding(expression, watching, voyeurism) |
| investigation(scrutiny, watching, shadowing, voyeurism) |
| legwork(watching, voyeurism) |
| observation(scrutiny, investigation, shadowing) |
| observing(watching, voyeurism) |
| prying(watching, meddling, spying, voyeurism) |
| shadowing(scrutiny, investigation) |
| soundings(watching, voyeurism) |
| tailing(scrutiny, investigation, shadowing) |
| viewing(watching, voyeurism) |
| voyeurism(watching, meddling, spying) |