Here are some examples:
* Monarchy: Rule by a single person, typically a king or queen.
* Oligarchy: Rule by a small group of people, often the wealthy or powerful.
* Democracy: Rule by the people, often through elected representatives.
* Hierarchy: A system of ranking or organization where power is distributed in a pyramid-like structure.
* Anarchy: The absence of government or any form of rule.
So, in general, "archy" suggests the idea of rule, leadership, or order within a given context.