Most important, influential, or significant

• top

  1. The uppermost part, point, surface, or end:
  2. The part farthest from a given reference point:
  3. The crown of the head:

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• prime

  1. First or highest in rank or importance; main:
  2. Highest in quality; excellent:
  3. Being the most desired or suitable example of something:

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• primary

  1. First or highest in rank or importance; principal.
  2. Occurring first in time or sequence; earliest:
  3. Of or relating to primary schools.

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• premier

  1. First in status or importance; principal or chief:
  2. First to occur or exist; earliest.
  3. A prime minister.

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• paramount

  1. Of chief concern or importance:
  2. Highest in rank, power, or authority:
  3. One that has the highest rank, power, or authority.

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• number one

  1. One that is first in rank, order, or importance.
  2. One's own interests; oneself:
  3. The act of urinating.

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• major

  1. Greater than others in importance or rank:
  2. Great in scope or effect:
  3. Great in number, size, or extent:

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• main

  1. Most important; principal.
  2. Exerted to the utmost; sheer:
  3. Connected to or located near the mainmast:

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• leading

  1. Having a position in the lead; foremost:
  2. Chief; principal:
  3. Of or performing a lead in a theatrical production:

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• key

  1. A notched and grooved, usually metal implement that is turned to open or close a lock.
  2. A similar implement or an electronic device used for opening, winding, or starting something:
  3. A device, such as a wedge or pin, inserted to lock together mechanical or structural parts.

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• foremost

  1. More prominent or important than others, especially in position or rank:
  2. First in physical position or place:
  3. Above all else; most importantly:

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• first

  1. The ordinal number matching the number one in a series.
  2. The one coming, occurring, or ranking before or above all others.
  3. The beginning; the outset:

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• chief

  1. One who is highest in rank or authority; a leader.
  2. A chief petty officer.
  3. The chief engineer of a ship.

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• cardinal

  1. Of foremost importance; paramount:
  2. Dark to deep or vivid red.
  3. A high church official, ranking just below the pope, who has been appointed by a pope to membership in the College of Cardinals.

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• capital

  1. A town or city that is the official seat of government in a political entity, such as a state or nation.
  2. A city that is the center of a specific activity or industry:
  3. Wealth, especially in the form of financial or physical assets, used in the production or accumulation of more wealth.

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Having or exercising authority

• head

  1. The uppermost or forwardmost part of the body of a vertebrate, containing the brain and the eyes, ears, nose, mouth, and jaws.
  2. The analogous part of an invertebrate organism.
  3. The length or height of such a part:

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• chief

  1. One who is highest in rank or authority; a leader.
  2. A chief petty officer.
  3. The chief engineer of a ship.

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The main performer in a theatrical production

• star

  1. A celestial body that generates light and other radiant energy and consists of a mass of gas held together by its own gravity in which the energy generated by nuclear reactions in the interior is balanced by the outflow of energy to the surface, and the inward-directed gravitational forces are balanced by the outward-directed gas and radiation pressures.
  2. Any of the celestial bodies visible at night from Earth as relatively stationary, usually twinkling points of light.
  3. Something regarded as resembling such a celestial body.

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• protagonist

  1. The main character in a drama or other literary work.
  2. In ancient Greek drama, the first actor to engage in dialogue with the chorus, in later dramas playing the main character and some minor characters as well.
  3. A leading or principal figure.

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• lead

  1. To show the way to by going in advance:
  2. To guide or direct in a course:
  3. To serve as a route for; take:

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