authoritarian

nouns

a person who behaves in a tyrannical manner
"my boss is a dictator who makes everyone work overtime"
authoritarian, dictator

adjectives

characteristic of an absolute ruler or absolute rule; having absolute sovereignty
"an authoritarian regime"; "autocratic government"; "despotic rulers"; "a dictatorial rule that lasted for the duration of the war"; "a tyrannical government"
authoritarian, autocratic, despotic, dictatorial, tyrannic, tyrannical
expecting unquestioning obedience
"the timid child of authoritarian parents"; "insufferably overbearing behavior toward the waiter"
authoritarian, dictatorial, overbearing