In general, what is one similarity between a dictatorship and a monarchy? They are forms of communism. The leader expects to rule for life. The leader gains power by force. They are forms of oligarchy.

The leader expects to rule for life.

Explanation:

In both a dictatorship and a monarchy. the leader expects to rule for life.

In a monarchy, the leader, or monarch, obtains power because of his lineage, usually because of being the son or daughter of the previous king or queen.

In a dictatorship, the leader obtains power by force, or in some other way, and once in power, exercises control over many aspects of life, without toletaring other political parties.

Both the dictator and the monarch expect to live for life and pick a successor.