President of the United States vs President Roosevelt

President of the United States and President Roosevelt both are nouns.

Word	Noun	Adjective	Verb	Adverb
President of the United States	Yes	No	No	No
President Roosevelt	Yes	No	No	No

President of the United States (noun)	President Roosevelt (noun)
the office of the United States head of state	26th President of the United States; hero of the Spanish-American War; Panama Canal was built during his administration
the person who holds the office of head of state of the United States government	32nd President of the United States; elected four times; instituted New Deal to counter the Great Depression and led country during World War II (1882-1945)