Here are some synonyms for pandemonium:
* Chaos
* Anarchy
* Tumult
* Uproar
* Bedlam
* Mayhem
* Hubbub
Origin:
The word "pandemonium" comes from the epic poem *Paradise Lost* by John Milton. In the poem, Pandemonium is the capital city of Hell, where the fallen angels reside. The term has since come to be associated with any place or situation that is characterized by extreme disorder and confusion.