Monroe vs Norma Jean Baker

Monroe and Norma Jean Baker both are nouns.

Word	Noun	Adjective	Verb	Adverb
Monroe	Yes	No	No	No
Norma Jean Baker	Yes	No	No	No

As nouns, Monroe and Norma Jean Baker are synonyms defined as:

Monroe and Norma Jean Baker: United States film actress noted for sex appeal (1926-1962)

Other synonyms of Monroe include Marilyn Monroe.

Monroe (noun)	Norma Jean Baker (noun)
a town in north central Louisiana	United States film actress noted for sex appeal (1926-1962)
a town of southeast Michigan on Lake Erie
5th President of the United States; author of the Monroe Doctrine (1758-1831)
United States film actress noted for sex appeal (1926-1962)