I think the names of systems is largely secondary to what's happening within those systems. James Madison has an excellent quote on this: "The accumulation of all powers, Legislative, Executive, and Judiciary, in the same hands, whether of one, a few, or many, and whether hereditary, self-appointed, or elective, may justly be pronounced the very definition of tyranny."

It's from Federalist Papers #47 [1].

[1] - https://avalon.law.yale.edu/18th_century/fed47.asp