Noun

• S: (n) lookout, lookout man, sentinel, sentry, watch, spotter, scout, picket (a person employed to keep watch for some anticipated event)
• S: (n) Scout (a Boy Scout or Girl Scout)
• S: (n) scout, talent scout (someone employed to discover and recruit talented persons (especially in the worlds of entertainment or sports))
• S: (n) scout, pathfinder, guide (someone who can find paths through unexplored territory)

Verb

• S: (v) scout, reconnoiter, reconnoitre (explore, often with the goal of finding something or somebody)