Pepin vs king

Pepin and king both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pepin	Yes	No	No	No
king	Yes	No	No	No

Pepin (noun)	king (noun)
king of the Franks and father of Charlemagne who defended papal interests and founded the Carolingian dynasty in 751 (714-768)	(chess) the weakest but the most important piece
	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