tyrannic vs tyranny

tyrannic is not a noun while tyranny is a noun.

Word	Noun	Adjective	Verb	Adverb
tyrannic	No	Yes	No	No
tyranny	Yes	No	No	No

tyrannic (noun)	tyranny (noun)
	a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.)
	dominance through threat of punishment and violence

tyrannic (adjective)	tyranny (adjective)
characteristic of an absolute ruler or absolute rule; having absolute sovereignty