President vs Chief Executive

President and Chief Executive both are nouns.

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

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

President and Chief Executive: the office of the United States head of state

Other synonyms of President include President of the United States.

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

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

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

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