functionary vs official

functionary and official both are nouns.

Word	Noun	Adjective	Verb	Adverb
functionary	Yes	No	No	No
official	Yes	Yes	No	No

As nouns, functionary and official are synonyms defined as:

functionary and official: a worker who holds or is invested with an office

functionary (noun)	official (noun)
a worker who holds or is invested with an office	someone who administers the rules of a game or sport
	a worker who holds or is invested with an office

functionary (adjective)	official (adjective)
	having official authority or sanction
	of or relating to an office
	verified officially
	(of a church) given official status as a national or state institution
	conforming to set usage, procedure, or discipline