tyrant
The term of despot is frequently used for a person with unlimited authority. Also, dictator is another often used term.
He was a dictator, although he would have used the term Emperor.
The term of office for a Roman dictator was supposed to be six months, but it could be renewed if the dictator had not finished his job in that length of time. However it was expected that a dictator would resign the office once he had finished the job even though his sis month term had not expired.
The term of despot is frequently used for a person with unlimited authority. Also, dictator is another often used term.
authoritarian
Dictators were appointed for a term of 6 months.
The term is sometimes used of Hitler.
the term "dictator" is generally used to describe a leader who holds an extraordinary amount of personal power.
Tyrant, despot
yes
Dictator
a shogun.