tyrant vs swayer

tyrant and swayer both are nouns.

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

As nouns, swayer is a hypernym of tyrant; that is, swayer is a word with a broader meaning than tyrant:

tyrant: in ancient Greece, a ruler who had seized power without legal right to it
swayer: a person who rules or commands

Other hypernyms of tyrant include ruler.

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