autocratic vs dictatorial

autocratic and dictatorial both are adjectives.

Word	Noun	Adjective	Verb	Adverb
autocratic	No	Yes	No	No
dictatorial	No	Yes	No	No

As adjectives, autocratic and dictatorial are synonyms defined as:

autocratic and dictatorial: characteristic of an absolute ruler or absolute rule; having absolute sovereignty

Other synonyms of autocratic include authoritarian, despotic, tyrannic, tyrannical.

autocratic (adjective)	dictatorial (adjective)
offensively self-assured or given to exercising usually unwarranted power	of or characteristic of a dictator
characteristic of an absolute ruler or absolute rule; having absolute sovereignty	expecting unquestioning obedience
	characteristic of an absolute ruler or absolute rule; having absolute sovereignty