Proponent
Part of speech: noun
Definition: One who supports something; an advocate
Advocator
Part of speech: noun
Definition: One who advocates.
Proponent as a noun is one who supports something; an advocate while Advocator as a noun is one who advocates.
Part of speech: noun
Definition: One who supports something; an advocate
Part of speech: noun
Definition: One who advocates.
We hope you now know whether to use Proponent or Advocator in your sentence.