outpost vs military post

outpost and military post both are nouns.

Word	Noun	Adjective	Verb	Adverb
outpost	Yes	No	No	No
military post	Yes	No	No	No

As nouns, military post is a hypernym of outpost; that is, military post is a word with a broader meaning than outpost:

outpost: a military post stationed at a distance from the main body of troops
military post: military installation at which a body of troops is stationed

Other hypernyms of outpost include post.

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