| inspection(noun, bug, scrutiny, investigation, monitor) |
| lookout(noun, bug, scrutiny, investigation, monitor) |
| monitor(noun, verb, bug, spy) |
| peeled eye(noun, expression, bug, investigation, monitor) |
| scrutiny(noun, bug, investigation, monitor) |
| snoop(verb, bug, spy, monitor, poke) |
| superintendence(noun, bug, scrutiny, investigation, monitor) |
| supervision(noun, bug, scrutiny, investigation, monitor) |
| surveyance(noun, bug, scrutiny, investigation, monitor) |
| tab(noun, bug, scrutiny, investigation, monitor) |
| tail(noun, bug, scrutiny, investigation, monitor) |
| track(noun, bug, scrutiny, investigation, monitor) |
| tune in on(verb, expression, idiom, bug, poke) |
| vigil(noun, bug, scrutiny, investigation, monitor) |
| vigilance(noun, bug, scrutiny, investigation, monitor) |
| watch(noun, bug, scrutiny, investigation, monitor) |
| keep under surveillance(verb, expression, idiom) |
| listen in on(verb, expression, idiom, phrasal verb, bug) |
| overhear(verb, bug, spy, monitor) |
| spy on(verb, expression) |