lookout vs observatory

lookout and observatory both are nouns.

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

As nouns, lookout and observatory are synonyms defined as:

lookout and observatory: a structure commanding a wide view of its surroundings

Other synonyms of lookout include lookout station, observation tower.

lookout (noun)	observatory (noun)
the act of looking out	a building designed and equipped to observe astronomical phenomena
a structure commanding a wide view of its surroundings	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