king vs Gustavus II

king and Gustavus II both are nouns.

Word	Noun	Adjective	Verb	Adverb
king	Yes	No	No	No
Gustavus II	Yes	No	No	No

king (noun)	Gustavus II (noun)
(chess) the weakest but the most important piece	king of Sweden whose victories in battle made Sweden a European power; his domestic reforms made Sweden a modern state; in 1630 he intervened on the Protestant side of the Thirty Years' War and was killed in the battle of Lutzen (1594-1632)
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