advocator vs exponent

advocator and exponent both are nouns.

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

As nouns, advocator and exponent are synonyms defined as:

advocator and exponent: a person who pleads for a cause or propounds an idea

Other synonyms of advocator include advocate, proponent.

advocator (noun)	exponent (noun)
a person who pleads for a cause or propounds an idea	a mathematical notation indicating the number of times a quantity is multiplied by itself
	a person who pleads for a cause or propounds an idea
	someone who expounds and interprets or explains