James Buchanan vs Buchanan

James Buchanan and Buchanan both are nouns.

Word	Noun	Adjective	Verb	Adverb
James Buchanan	Yes	No	No	No
Buchanan	Yes	No	No	No

As nouns, James Buchanan and Buchanan are synonyms defined as:

James Buchanan and Buchanan: 15th President of the United States (1791-1868)

Other synonyms of James Buchanan include President Buchanan.

James Buchanan (noun)	Buchanan (noun)
15th President of the United States (1791-1868)	15th President of the United States (1791-1868)