political science vs civilization

political science and civilization both are nouns.

Word	Noun	Adjective	Verb	Adverb
political science	Yes	No	No	No
civilization	Yes	No	No	No

political science (noun)	civilization (noun)
the study of government of states and other political units	the quality of excellence in thought and manners and taste
	a society in an advanced state of social development (e.g., with complex legal and political and religious organizations)
	a particular society at a particular time and place
	the social process whereby societies achieve an advanced stage of development and organization