up·heav·al /ˌʌpˈhi:vəl/ noun plural up·heav·als
a major change or period of change that causes a lot of conflict, confusion, anger, etc. [noncount
] ▪ The civil rights movement marked a period of social upheaval in the U.S. ▪ the emotional upheaval of divorce
] ▪ a period of cultural and social upheavals
2 technical :
an occurrence in which a part of the Earth's surface moves up forcefully [count
] ▪ The island was created by an upheaval of the ocean floor.
] ▪ The lake was formed by geologic upheaval.