mission vs delegacy

mission and delegacy both are nouns.

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

As nouns, mission and delegacy are synonyms defined as:

Other synonyms of mission include commission, delegation, deputation.

mission (noun)	delegacy (noun)
a special assignment that is given to a person or group	the appointment of a delegate
an operation that is assigned by a higher headquarters	a group of representatives or delegates
the organized work of a religious missionary	the state of serving as an official and authorized delegate or agent
a group of representatives or delegates
an organization of missionaries in a foreign land sent to carry on religious work