deputation vs delegacy

deputation and delegacy both are nouns.

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

As nouns, deputation and delegacy are synonyms defined as:

Other synonyms of deputation include commission, delegation, mission.

deputation (noun)	delegacy (noun)
authorizing subordinates to make certain decisions	the appointment of a delegate
a group of representatives or delegates	a group of representatives or delegates
	the state of serving as an official and authorized delegate or agent