upheaval

US /ʌpˈhiː.vəl/
UK /ʌpˈhiː.vəl/
"upheaval" picture
1.

a violent or sudden change or disruption to something

:
•
The political upheaval led to a change in government.
•
The company is undergoing a major organizational upheaval.
:
disruptionturmoildisordercommotiondisturbance