kannattaja (englanniksi)

supporter (s: henkilö joka kannattaa jotain asiaa tai jotakuta henkilöä tai joukkuetta)
fan (s)
admirer (s)
adherent (s)
devotee (s)
enthusiast (s)
booster or aficionado (s: supporter of a sports team etc.)
second (s: one who agrees in a motion, as required in certain meetings to pass judgement etc.)
advocate (s: person who speaks in support of something)
follower (s: one who adheres to the opinions, ideas, or teachings of another)
stalwart (s: one who firmly supports a cause)