Supporter
Part of speech: noun
Definition: Something that supports a structure such as a building. A person who supports, promotes, advocates or champions a cause or movement; an adherent. An animal or figure that supports a shield in a coat of arms. A garter worn around the leg to support a sock or stocking
Example sentence: I heard from Stephen Sondheim, who has become a great supporter of mine. There was no one bigger when I was growing up.
Helper
Part of speech: noun
Definition: One who helps; an aide.
Example sentence: This is one of the last unique things to do in the business of sports, to return the National Football League to the city of Los Angeles. I happen to love the city of Los Angeles; I happen to love the NFL - and to somehow be a part of that, a helper in that process, is something I've always been interested in.