preside vs president

preside is not a noun while president is a noun.

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

preside (noun)	president (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

preside (verb)	president (verb)
act as president