What is another word for spectator?

Here are some other words for spectator, depending on the context:

Formal:

* Observer

* Onlooker

* Witness

* Audience

* Viewers

* Beholder

Informal:

* Watcher

* Looker-on

* Bystander

* Crowds

* Fans

More specific:

* Patron (for theater or sports)

* Fanatic (for sports or entertainment)

* Gamer (for video games)

* Reader (for literature)

* Listener (for music or lectures)

The best word will depend on the specific situation and the tone you want to convey.