James Earl Carter Jr. vs President Carter

James Earl Carter Jr. and President Carter both are nouns.

Word	Noun	Adjective	Verb	Adverb
James Earl Carter Jr.	Yes	No	No	No
President Carter	Yes	No	No	No

As nouns, James Earl Carter Jr. and President Carter are synonyms defined as:

James Earl Carter Jr. and President Carter: 39th President of the United States (1924-)

Other synonyms of James Earl Carter Jr. include Carter, James Earl Carter, Jimmy Carter.

James Earl Carter Jr. (noun)	President Carter (noun)
39th President of the United States (1924-)	39th President of the United States (1924-)