formal vs official

formal and official both are nouns.

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

formal (noun)	official (noun)
a gown for evening wear	someone who administers the rules of a game or sport
a lavish dance requiring formal attire	a worker who holds or is invested with an office

formal (adjective)	official (adjective)
being in accord with established forms and conventions and requirements (as e.g. of formal dress)	having official authority or sanction
(of spoken and written language) adhering to traditional standards of correctness and without casual, contracted, and colloquial forms	of or relating to an office
refined or imposing in manner or appearance; befitting a royal court	verified officially
logically deductive	(of a church) given official status as a national or state institution
represented in simplified or symbolic form	conforming to set usage, procedure, or discipline
characteristic of or befitting a person in authority