Grey vs Zane Grey

Grey and Zane Grey both are nouns.

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

As nouns, Grey and Zane Grey are synonyms defined as:

Grey and Zane Grey: United States writer of western adventure novels (1875-1939)

Grey (noun)	Zane Grey (noun)
Englishman who as Prime Minister implemented social reforms including the abolition of slavery throughout the British Empire (1764-1845)	United States writer of western adventure novels (1875-1939)
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)