supporter
sup-port-er
noun
A person who advocates for or provides assistance to a particular person or cause.
"She is a strong supporter of local charities."
noun
An enthusiastic fan of a sports team, club, or individual athlete.
"Thousands of football supporters travelled to the match."
Thesaurus
Synonyms: admirer, protagonist, champion, friend, booster, athletic supporter, suspensor, jockstrap, jock, helper, assistant, help