spotter vs lookout

spotter and lookout both are nouns.

Word	Noun	Adjective	Verb	Adverb
spotter	Yes	No	No	No
lookout	Yes	No	No	No

As nouns, spotter and lookout are synonyms defined as:

spotter and lookout: a person employed to keep watch for some anticipated event

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

spotter (noun)	lookout (noun)
someone who is the first to observe something	the act of looking out
a worker employed to apply spots (as markers or identifiers)	a structure commanding a wide view of its surroundings
a worker employed at a dry-cleaning establishment to remove spots	an elevated post affording a wide view
a person employed to keep watch for some anticipated event	a person employed to keep watch for some anticipated event