Grey vs author

Grey and author both are nouns.

Word	Noun	Adjective	Verb	Adverb
Grey	Yes	No	No	No
author	Yes	No	Yes	No

Grey (noun)	author (noun)
Englishman who as Prime Minister implemented social reforms including the abolition of slavery throughout the British Empire (1764-1845)	writes (books or stories or articles or the like) professionally (for pay)
Queen of England for nine days in 1553; she was quickly replaced by Mary Tudor and beheaded for treason (1536-1554)	someone who originates or causes or initiates something
United States writer of western adventure novels (1875-1939)

Grey (verb)	author (verb)
	be the author of