author vs Grey

author and Grey both are nouns.

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

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

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