noun
pandemonium
pan-duh-MOH-nee-um/ˌpændəˈməʊniəm/
Wild and noisy confusion.
Pandemonium erupts as papers blow around the classroom and students scramble.

Etymology
Milton combined “all” and “evil spirit” to name the capital of Hell, home to all the demons. The name later meant a place of uproar and disorder, then wild confusion itself.
In context
KAT: We ran out of the building, it was pandemonium, chaos, the ground was rolling.
More examples
- The teacher struggles to restore order amid the pandemonium.
- The escaped goat causes pandemonium at the farmers market.
- With everyone shouting at once, the meeting descends into pandemonium.