upheaval
up.heav.al \.*p-'he--v*l, (.)*-'pe--\ n 1: the action or an instance of upheaving esp. of part of the earth's crust 2: an instance of violent agitation or change
Webster's English Dictionaryup.heav.al \.*p-'he--v*l, (.)*-'pe--\ n 1: the action or an instance of upheaving esp. of part of the earth's crust 2: an instance of violent agitation or change