Answer :
Final answer:
In a monarchy, the sovereign holds supreme power as a ruler, often until abdication, contrasting with democratic governance.
Explanation:
Sovereign is the correct vocabulary word that matches the definition of 'a supreme ruler, especially a monarch.' In a monarchy, supreme power is held by an individual, typically a monarch, who governs until death or abdication. This system contrasts with governments like democracies, where power is distributed among the population.
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