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countable and uncountable, plural upheavals
Disruptive change, from one state to another. quotations examples
Scotland's bottleneck junction between the West and East Coast main lines at Carstairs will be the site of major upheaval until the end of May, while £164 million worth of improvements are carried out.
2023 March 8, “Network News: Carstairs shut for main line upgrade”, in RAIL, number 978, page 11
The process of being heaved upward, especially the raising of part of the earth's crust. examples
A sudden violent upset, disruption or convulsion. quotations examples
Since that upheaval Wales have won just once in seven games, beating Northern Ireland in the Nations Cup last May.
2011 September 2, “Wales 2-1 Montenegro”, in BBC