rulership

As a proper noun dominion

is any of the self-governing nations of the british commonwealth.

As a noun rulership is

a position in which one rules or has sovereignty over others.

As nouns the difference between rule and rulership

is that rule is a regulation, law, guideline while rulership is a position in which one rules or has sovereignty over others.

As a verb rule

is to regulate, be in charge of, make decisions for, reign over.

As nouns the difference between rulership and governance

is that rulership is a position in which one rules or has sovereignty over others while governance is the process, or the power, of governing; government or administration.