president vs preside

president is a noun but preside is not a noun.

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

president (noun)	preside (noun)
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

president (verb)	preside (verb)
	act as president