missioner vs mission

missioner and mission both are nouns.

Word	Noun	Adjective	Verb	Adverb
missioner	Yes	No	No	No
mission	Yes	No	No	No

missioner (noun)	mission (noun)
someone sent on a mission--especially a religious or charitable mission to a foreign country	a special assignment that is given to a person or group
	an operation that is assigned by a higher headquarters
	the organized work of a religious missionary
	a group of representatives or delegates
	an organization of missionaries in a foreign land sent to carry on religious work