nominal vs specified

nominal is a noun but specified is not a noun.

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

nominal (noun)	specified (noun)
a phrase that can function as the subject or object of a verb

nominal (adjective)	specified (adjective)
of, relating to, or characteristic of an amount that is not adjusted for inflation	clearly and explicitly stated
pertaining to a noun or to a word group that functions as a noun
relating to or constituting or bearing or giving a name
existing in name only
insignificantly small; a matter of form only (`tokenish' is informal)
named; bearing the name of a specific person