President Buchanan vs James Buchanan

President Buchanan and James Buchanan both are nouns.

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

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

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

Other synonyms of President Buchanan include Buchanan.

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