* Democracy: The principle of rule by the people.
* Republic: A state in which supreme power is held by the people and their elected representatives.
* Monarchy: Rule by a monarch (king, queen, emperor, empress).
* Dictatorship: Rule by a single person with absolute power.
* Communism: A political and economic system based on collective ownership of the means of production.
* Socialism: A political and economic system that aims to achieve social justice through democratic means.
* Theocracy: Rule by religious leaders.
* Oligarchy: Rule by a small group of people.
* Autocracy: Rule by a single person with absolute power (similar to dictatorship).
* Totalitarianism: A political system that seeks complete control over all aspects of public and private life.
* Federalism: A system of government in which power is divided between a central authority and regional or local authorities.
These abstract nouns capture the essence of different forms of government, focusing on the principles and ideologies behind them rather than the specific institutions or individuals involved.