Nouns

(n)supporter, protagonist, champion, admirer, booster, frienda person who backs a politician or a team etc.“all their supporters came out for the game”, “they are friends of the library”
(n)patron, sponsor, supportersomeone who supports or champions something
(n)assistant, helper, help, supportera person who contributes to the fulfillment of a need or furtherance of an effort or purpose“my invaluable assistant”, “they hired additional help to finish the work”
(n)garter, supportera band (usually elastic) worn around the leg to hold up a stocking (or around the arm to hold up a sleeve)
(n)athletic supporter, supporter, suspensor, jockstrap, jocka support for the genitals worn by men engaging in strenuous exercise