king vs Ferdinand II of Aragon

king and Ferdinand II of Aragon both are nouns.

Word	Noun	Adjective	Verb	Adverb
king	Yes	No	No	No
Ferdinand II of Aragon	Yes	No	No	No

king (noun)	Ferdinand II of Aragon (noun)
(chess) the weakest but the most important piece	the king of Castile and Aragon who ruled jointly with his wife Isabella; his marriage to Isabella I in 1469 marked the beginning of the modern state of Spain and their capture of Granada from the Moors in 1492 united Spain as one country; they instituted the Spanish Inquisition in 1478 and supported the expedition of Christopher Columbus in 1492 (1452-1516)
one of the four playing cards in a deck bearing the picture of a king
a 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
a male sovereign; ruler of a kingdom
a very wealthy or powerful businessman
a male competitor who holds a preeminent position
the husband or widower of a queen
preeminence in a particular category or group or field