specified vs nominative

specified is not a noun while nominative is a noun.

Word	Noun	Adjective	Verb	Adverb
specified	No	Yes	No	No
nominative	Yes	Yes	No	No

specified (noun)	nominative (noun)
	the category of nouns serving as the grammatical subject of a verb

specified (adjective)	nominative (adjective)
clearly and explicitly stated	serving as or indicating the subject of a verb and words identified with the subject of a copular verb
	appointed by nomination
	named; bearing the name of a specific person