Nouns

(n)king, male monarch, Rexa male sovereign; ruler of a kingdom
(n)baron, business leader, king, magnate, mogul, power, top executive, tycoona very wealthy or powerful businessperson“an oil baron”
(n)kingpreeminence in a particular category or group or field“the lion is the king of beasts”
(n)kinga checker that has been moved to the opponent's first row where it is promoted to a piece that is free to move either forward or backward
(n)kingone of the four playing cards in a deck bearing the picture of a king
(n)king(chess) the weakest but the most important piece
(n)kinga male competitor who holds a preeminent position
(n)kingthe husband or widower of a queen