prescribed vs formal

prescribed is not a noun while formal is a noun.

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

prescribed (noun)	formal (noun)
	a gown for evening wear
	a lavish dance requiring formal attire

prescribed (adjective)	formal (adjective)
formally laid down or imposed	being in accord with established forms and conventions and requirements (as e.g. of formal dress)
set down as a rule or guide	(of spoken and written language) adhering to traditional standards of correctness and without casual, contracted, and colloquial forms
conforming to set usage, procedure, or discipline	refined or imposing in manner or appearance; befitting a royal court
fixed or established especially by order or command	logically deductive
	represented in simplified or symbolic form
	characteristic of or befitting a person in authority