Emily Price Post vs author

Emily Price Post and author both are nouns.

Word	Noun	Adjective	Verb	Adverb
Emily Price Post	Yes	No	No	No
author	Yes	No	Yes	No

Emily Price Post (noun)	author (noun)
United States female author who wrote a book and a syndicated newspaper column on etiquette (1872-1960)	writes (books or stories or articles or the like) professionally (for pay)
	someone who originates or causes or initiates something

Emily Price Post (verb)	author (verb)
	be the author of