William Augustus vs Cumberland

William Augustus and Cumberland both are nouns.

Word	Noun	Adjective	Verb	Adverb
William Augustus	Yes	No	No	No
Cumberland	Yes	No	No	No

As nouns, William Augustus and Cumberland are synonyms defined as:

William Augustus and Cumberland: English general; son of George II; fought unsuccessfully in the battle of Fontenoy (1721-1765)

Other synonyms of William Augustus include Butcher Cumberland, Duke of Cumberland, Prince William, Duke of Cumberland.

William Augustus (noun)	Cumberland (noun)
English general; son of George II; fought unsuccessfully in the battle of Fontenoy (1721-1765)	a river that rises in southeastern Kentucky and flows westward through northern Tennessee to become a tributary of the Ohio River in southwestern Kentucky
	English general; son of George II; fought unsuccessfully in the battle of Fontenoy (1721-1765)