economic science vs political economy

economic science and political economy both are nouns.

Word	Noun	Adjective	Verb	Adverb
economic science	Yes	No	No	No
political economy	Yes	No	No	No

As nouns, economic science and political economy are synonyms defined as:

economic science and political economy: the branch of social science that deals with the production and distribution and consumption of goods and services and their management

Other synonyms of economic science include economics.

economic science (noun)	political economy (noun)
the branch of social science that deals with the production and distribution and consumption of goods and services and their management	the branch of social science that deals with the production and distribution and consumption of goods and services and their management