tyrant vs despot

tyrant and despot both are nouns.

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

As nouns, tyrant and despot are synonyms defined as:

Other synonyms of tyrant include autocrat.

tyrant (noun)	despot (noun)
a cruel and oppressive dictator	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