upheaval
//ʌpˈhiːvəl//
Noun
upheavalSingular
upheavalsPlural
1
A violent or sudden change or disruption to something.
The country experienced a political upheaval after the election.
2
An upward displacement of part of the earth's crust.
The mountain range was formed by a massive upheaval of the earth's crust millions of years ago.