| glimpse(verb, activity, consider, see, note) |
| sleuth(noun, verb, person, information, follow) |
| undercover agent(noun, expression, idiom, person, plant) |
| snoop(noun, verb, person, follow, plant) |
| scout(noun, verb, study, person, consider) |
| secret agent(noun, expression, idiom, person, plant) |
| watch(noun, verb, mark, consider, see) |
| descry(verb, activity, consider, see, note) |
| detective(noun, person, information, plant, watch) |
| observe(verb, mark, consider, see, note) |
| spot(noun, verb, mark, consider, see) |
| espy(noun, verb, mark, consider, see) |
| view(verb, mark, consider, see, respect) |
| detect(verb, activity, mark, consider, see) |
| pry(verb, study, consider, sound, follow) |
| stag(verb, follow, discover, watch, eyeball) |
| behold(verb, mark, consider, see, respect) |
| discern(verb, mark, consider, see, note) |
| discover(verb, activity, mark, see, note) |
| distinguish(verb, mark, consider, see, note) |