nominal vs political economy

nominal and political economy both are nouns.

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

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

nominal (adjective)	political economy (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