civilization vs political science

civilization and political science both are nouns.

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

civilization (noun)	political science (noun)
the quality of excellence in thought and manners and taste	the study of government of states and other political units
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