lookout station vs observation tower

lookout station and observation tower both are nouns.

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

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

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

Other synonyms of lookout station include lookout, observatory.

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