delegacy vs mission

delegacy and mission both are nouns.

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

As nouns, delegacy and mission are synonyms defined as:

Other synonyms of delegacy include commission, delegation, deputation.

delegacy (noun)	mission (noun)
the appointment of a delegate	a special assignment that is given to a person or group
a group of representatives or delegates	an operation that is assigned by a higher headquarters
the state of serving as an official and authorized delegate or agent	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