chairwoman vs president

chairwoman and president both are nouns.

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

As nouns, president is a hypernym of chairwoman; that is, president is a word with a broader meaning than chairwoman:

chairwoman: the female officer who presides at the meetings of an organization
president: the officer who presides at the meetings of an organization

Other hypernyms of chairwoman include chair, chairperson, adult female, woman.

chairwoman (noun)	president (noun)
the female 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