interpreter vs advocator

interpreter and advocator both are nouns.

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

As nouns, advocator is a hypernym of interpreter; that is, advocator is a word with a broader meaning than interpreter:

Other hypernyms of interpreter include advocate, exponent, proponent.

interpreter (noun)	advocator (noun)
(computer science) a program that translates and executes source language statements one line at a time	a person who pleads for a cause or propounds an idea
an advocate who represents someone else's policy or purpose
someone who mediates between speakers of different languages
someone who uses art to represent something