tyrant vs tyrannize

tyrant is a noun but tyrannize is not a noun.

Word	Noun	Adjective	Verb	Adverb
tyrant	Yes	No	No	No
tyrannize	No	No	Yes	No

tyrant (noun)	tyrannize (noun)
a cruel and oppressive dictator
any person who exercises power in a cruel way
in ancient Greece, a ruler who had seized power without legal right to it

tyrant (verb)	tyrannize (verb)
	rule or exercise power over (somebody) in a cruel and autocratic manner
	rule a country as a tyrant