United States President vs Chief Executive

United States President and Chief Executive both are nouns.

Word	Noun	Adjective	Verb	Adverb
United States President	Yes	No	No	No
Chief Executive	Yes	No	No	No

As nouns, United States President and Chief Executive are synonyms defined as:

United States President and Chief Executive: the person who holds the office of head of state of the United States government

Other synonyms of United States President include President, President of the United States.

United States President (noun)	Chief Executive (noun)
the person who holds the office of head of state of the United States government	the office of the United States head of state
	the person who holds the office of head of state of the United States government