President Kennedy vs Kennedy

President Kennedy and Kennedy both are nouns.

Word	Noun	Adjective	Verb	Adverb
President Kennedy	Yes	No	No	No
Kennedy	Yes	No	No	No

As nouns, President Kennedy and Kennedy are synonyms defined as:

President Kennedy and Kennedy: 35th President of the United States; established the Peace Corps; assassinated in Dallas (1917-1963)

Other synonyms of President Kennedy include Jack Kennedy, JFK, John Fitzgerald Kennedy, President John F. Kennedy.

President Kennedy (noun)	Kennedy (noun)
35th President of the United States; established the Peace Corps; assassinated in Dallas (1917-1963)	a large airport on Long Island to the east of New York City
	35th President of the United States; established the Peace Corps; assassinated in Dallas (1917-1963)