observation tower vs lookout station

observation tower and lookout station both are nouns.

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

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

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

Other synonyms of observation tower include lookout, observatory.

observation tower (noun)	lookout station (noun)
a structure commanding a wide view of its surroundings	a structure commanding a wide view of its surroundings