outpost vs outstation

outpost and outstation both are nouns.

Word	Noun	Adjective	Verb	Adverb
outpost	Yes	No	No	No
outstation	Yes	No	No	No

As nouns, outpost and outstation are synonyms defined as:

outpost and outstation: a station in a remote or sparsely populated location

outpost (noun)	outstation (noun)
a military post stationed at a distance from the main body of troops	a station in a remote or sparsely populated location
a settlement on the frontier of civilization
a station in a remote or sparsely populated location