| guide(noun, lead, head, watch, anticipate) |
| patrol(noun, verb, person, plant, case) |
| explore(verb, study, check, consider, follow) |
| spy(noun, verb, study, person, consider) |
| watch(noun, verb, study, check, see) |
| lookout(noun, person, place, plant, watch) |
| explorer(noun, person, guide, watch, spy) |
| precursor(noun, person, watch, spy, lookout) |
| reconnoiter(verb, study, check, consider, examine) |
| sentinel(noun, case, watch, guard, warning) |
| picket(noun, person, plant, watch, guard) |
| vanguard(noun, person, model, watch, leader) |
| sentry(noun, case, watch, guard, post) |
| investigate(verb, study, check, consider, follow) |
| reconnoitre(verb, examine, try, discover, travel) |
| examine(verb, study, check, consider, observe) |
| spotter(noun, person, plant, case, watch) |
| lookout man(noun, expression, idiom) |
| pathfinder(noun, point, guide, model, watch) |
| pioneer(noun, verb, person, lead, model) |