peremptory vs autocratic

peremptory and autocratic both are adjectives.

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

As adjectives, peremptory and autocratic are synonyms defined as:

peremptory and autocratic: offensively self-assured or given to exercising usually unwarranted power

Other synonyms of peremptory include bossy, dominating, high-and-mighty, magisterial.

peremptory (adjective)	autocratic (adjective)
putting an end to all debate or action	offensively self-assured or given to exercising usually unwarranted power
offensively self-assured or given to exercising usually unwarranted power	characteristic of an absolute ruler or absolute rule; having absolute sovereignty
not allowing contradiction or refusal