libertarian vs exponent

libertarian and exponent both are nouns.

Word	Noun	Adjective	Verb	Adverb
libertarian	Yes	No	No	No
exponent	Yes	No	No	No

As nouns, exponent is a hypernym of libertarian; that is, exponent is a word with a broader meaning than libertarian:

Other hypernyms of libertarian include advocate, advocator, proponent.

libertarian (noun)	exponent (noun)
someone who believes the doctrine of free will	a mathematical notation indicating the number of times a quantity is multiplied by itself
an advocate of libertarianism	a person who pleads for a cause or propounds an idea
	someone who expounds and interprets or explains