mission vs missioner

mission and missioner both are nouns.

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

mission (noun)	missioner (noun)
a special assignment that is given to a person or group	someone sent on a mission--especially a religious or charitable mission to a foreign country
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