observation tower vs lookout

observation tower and lookout both are nouns.

Word	Noun	Adjective	Verb	Adverb
observation tower	Yes	No	No	No
lookout	Yes	No	No	No

As nouns, observation tower and lookout are synonyms defined as:

observation tower and lookout: a structure commanding a wide view of its surroundings

Other synonyms of observation tower include lookout station, observatory.

observation tower (noun)	lookout (noun)
a structure commanding a wide view of its surroundings	the act of looking out
	a structure commanding a wide view of its surroundings
	an elevated post affording a wide view
	a person employed to keep watch for some anticipated event