chairperson vs president

chairperson and president both are nouns.

Word	Noun	Adjective	Verb	Adverb
chairperson	Yes	No	No	No
president	Yes	No	No	No

As nouns, chairperson and president are synonyms defined as:

chairperson and president: the officer who presides at the meetings of an organization

Other synonyms of chairperson include chair.

chairperson (noun)	president (noun)
the officer who presides at the meetings of an organization	the chief executive of a republic
	an executive officer of a firm or corporation
	the head administrative officer of a college or university
	the officer who presides at the meetings of an organization