sentry vs scout

sentry and scout both are nouns.

Word	Noun	Adjective	Verb	Adverb
sentry	Yes	No	No	No
scout	Yes	No	Yes	No

As nouns, sentry and scout are synonyms defined as:

sentry and scout: a person employed to keep watch for some anticipated event

Other synonyms of sentry include lookout, lookout man, picket, sentinel, spotter, watch.

sentry (noun)	scout (noun)
a person employed to keep watch for some anticipated event	someone who can find paths through unexplored territory
	a person employed to keep watch for some anticipated event
	someone employed to discover and recruit talented persons (especially in the worlds of entertainment or sports)

sentry (verb)	scout (verb)
	explore, often with the goal of finding something or somebody