fan
person who is enthusiastically devoted to something or someone
stan
term for an overzealous fan and supporter of a celebrity
rail transport fan
railway enthusiast
Star Wars fandom
The base of fans on the Star Wars franchise
Ricardian
person interested in rehabilitating the reputation of Richard III of England
Trekkie
Star Trek fan
audiophile
person who pursues high-quality or realistic audio playback
fan of Han
fan of Han Kuo-yu
Swifties
fans of pop musician Taylor Swift
Barmy Army
Group of English cricket fans
sports fan
follower and supporter of an athlete, group of athletes, or a sports team
Disney adult
adult fan of The Walt Disney Company
Doctor Who fandom
fans of the series "Doctor Who"
K-pop fans
fans and supporters of any Korean pop group