General Chaos:
* Chaotic (most straightforward)
* Disordered
* Turbulent
* Unruly
* Unpredictable
* Random
* Disorganized
* Confused
More specific connotations:
* Pandemonium: Suggests wild, uncontrolled uproar
* Harrowing: Implies extreme emotional distress or fear
* Destructive: Emphasizes the damaging effects of chaos
* Anarchic: Suggests a lack of order and authority
* Abysmal: Highlights the depth and intensity of the chaos
The best choice depends on the context and the specific type of chaos you're describing.