advocate

verb (used with object), advocated, advocating.

1. to speak or write in favor of; support or urge by argument; recommend publicly:

He advocated higher salaries for teachers.

verb (used without object), advocated, advocating.

2. to act as an advocate:

a father who advocates for his disabled child.
noun

3. a person who speaks or writes in support or defense of a person,cause, etc. (usually followed by of):

an advocate of peace.
4. a person who pleads for or in behalf of another; intercesso