Buck vs author

Buck and author both are nouns.

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

Buck (noun)	author (noun)
United States author whose novels drew on her experiences as a missionary in China (1892-1973)	writes (books or stories or articles or the like) professionally (for pay)
	someone who originates or causes or initiates something

Buck (verb)	author (verb)
	be the author of