political economy vs nominal

political economy and nominal both are nouns.

Word	Noun	Adjective	Verb	Adverb
political economy	Yes	No	No	No
nominal	Yes	Yes	No	No

political economy (noun)	nominal (noun)
the branch of social science that deals with the production and distribution and consumption of goods and services and their management	a phrase that can function as the subject or object of a verb

political economy (adjective)	nominal (adjective)
	of, relating to, or characteristic of an amount that is not adjusted for inflation
	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