missionary station vs foreign mission

missionary station and foreign mission both are nouns.

Word	Noun	Adjective	Verb	Adverb
missionary station	Yes	No	No	No
foreign mission	Yes	No	No	No

As nouns, missionary station and foreign mission are synonyms defined as:

missionary station and foreign mission: an organization of missionaries in a foreign land sent to carry on religious work

Other synonyms of missionary station include mission, missionary post.

missionary station (noun)	foreign mission (noun)
an organization of missionaries in a foreign land sent to carry on religious work	an organization of missionaries in a foreign land sent to carry on religious work
	a permanent diplomatic mission headed by a minister