outstation vs outpost

outstation and outpost both are nouns.

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

As nouns, outstation and outpost are synonyms defined as:

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

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