independent vs political science

independent and political science both are nouns.

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

independent (noun)	political science (noun)
a writer or artist who sells services to different employers without a long-term contract with any of them	the study of government of states and other political units
a neutral or uncommitted person (especially in politics)

independent (adjective)	political science (adjective)
free from external control and constraint
(of a clause) capable of standing syntactically alone as a complete sentence
(of political bodies) not controlled by outside forces
not controlled by a party or interest group