History
History
Synonyms
UK
US
Meaning:
booster

something that encourages a person, activity etc

supporter

devotee

a person who is very interested in something

ardent supporter; fan

disciple

a follower of any leader of religious thought, art, learning etc (especially one of the twelve personal followers of Jesus Christ)

believer, follower

enthusiast

a person with a strong interest (in sports, games etc)

person active in interest

ROOTER as in Wiktionary
ROOTER as in Wikipedia