king vs Ethelred

king and Ethelred both are nouns.

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

king (noun)	Ethelred (noun)
(chess) the weakest but the most important piece	king of Wessex and Kent and elder brother of Alfred; Alfred joined Ethelred's battle against the invading Danes and succeeded him on his death (died in 871)
one of the four playing cards in a deck bearing the picture of a king	king of the English who succeeded to the throne after his half-brother Edward the Martyr was murdered; he struggled unsuccessfully against the invading Danes (969-1016)
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