autocratic vs tyrannical

autocratic and tyrannical both are adjectives.

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

As adjectives, autocratic and tyrannical are synonyms defined as:

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

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

autocratic (adjective)	tyrannical (adjective)
offensively self-assured or given to exercising usually unwarranted power	marked by unjust severity or arbitrary behavior
characteristic of an absolute ruler or absolute rule; having absolute sovereignty	characteristic of an absolute ruler or absolute rule; having absolute sovereignty