Definition from Wiktionary, the free dictionary
overthrowal (plural overthrowals)
- The act of overthrowing something or someone.
- 1942: So he will interfere with natural growth by subjecting himself to unnatural discipline and putting himself to impossible tasks, such as the upsetting of kings and the overthrowal of empires. — Rebecca West, Black Lamb and Grey Falcon (Canongate 2006, p. 818)