fandom
noun /ˈfændəm/
  /ˈfændəm/
- [uncountable] the state of being a fan of somebody/something
- The book takes a fascinating look at sports fandom in the United States.
 - my 17 years of football fandom
 - Readers’ level of Harry Potter fandom was rated on a scale of one to five, based on a detailed questionnaire.
 
 - [countable] the fans of a particular person, team, TV show, etc. considered together as a community
- This US comedy show has a really strong fandom.