capital

Already-produced durable goods available for use as a factor of production, such as steam shovels (equipment) and office buildings (structures).

Money and wealth. The means to acquire goods and services, especially in a non-barter system.

"He does not have enough capital to start a business."

A city designated as a legislative seat by the government or some other authority, often the city in which the government is located; otherwise the most important city within a country or a subdivision of it.

"The Welsh government claims that Cardiff is Europe’s youngest capital."

Of prime importance.

Chief, in a political sense, as being the seat of the general government of a state or nation.

"London and Paris are capital cities."

Excellent.

"That is a capital idea!"