supporter

noun9

1. •
   A person who gives support to someone or something.
2. •
   A person who supports, promotes, advocates or champions a cause, movement, or political party; an adherent.

   • Linda Sanchez […] Strong supporter of intellectual property rights; consistently voted in favor of artists and songwriters on bills before the intellectual property subcommittee. — 2006
3. •
   A person who provides moral or physical support to another; an attendant participating in a ceremony or procession.
4. •
   Someone who is a fan of a certain sports team or sportsperson.

   • More than 10,000 supporters attended the last match.
5. •
   Something that supports another thing.
6. •
   Something that supports a structure such as a building or a sculpture.
7. •
   An animal or figure that supports a shield in a coat of arms.
8. •
   A garter worn around the leg to support a sock or stocking.

   • From the radiator, where he was attaching supporters to his socks, Zooey glanced up at her. — 1957
9. •
   Clipping of athletic supporter.